Home / 1,312,128,533.40-1,968,192,800.10-535,516,085.40

Finding the Fourth Proportional to 1,312,128,533.40, 1,968,192,800.10 and 535,516,085.40

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Solution

The fourth proportional to 1,312,128,533.40, 1,968,192,800.10 and 535,516,085.40 is: 803,274,128.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312,128,533.40 : 1,968,192,800.10 = 535,516,085.40 : x
  2. Step 2: Convert to fraction form
    1,312,128,533.40/1,968,192,800.10 = 535,516,085.40/x
  3. Step 3: Cross multiply
    1,312,128,533.40x = 1,968,192,800.10 × 535,516,085.40
  4. Step 4: Simplify right side
    1,312,128,533.40x = 1,053,998,903,622,016,640
  5. Step 5: Solve for x
    x = 1,053,998,903,622,016,640/1,312,128,533.40
  6. Step 6: Final answer
    x = 803,274,128.10

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Half scale
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Double scale
Find fourth proportional to 1,312,128,534.40, 1,968,192,801.60 and 535,516,086.40
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.