Home / 1,121,472,001.20-1,682,208,001.80-637,742,593.20

Finding the Fourth Proportional to 1,121,472,001.20, 1,682,208,001.80 and 637,742,593.20

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Solution

The fourth proportional to 1,121,472,001.20, 1,682,208,001.80 and 637,742,593.20 is: 956,613,889.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,121,472,001.20 : 1,682,208,001.80 = 637,742,593.20 : x
  2. Step 2: Convert to fraction form
    1,121,472,001.20/1,682,208,001.80 = 637,742,593.20/x
  3. Step 3: Cross multiply
    1,121,472,001.20x = 1,682,208,001.80 × 637,742,593.20
  4. Step 4: Simplify right side
    1,121,472,001.20x = 1,072,815,693,369,722,368
  5. Step 5: Solve for x
    x = 1,072,815,693,369,722,368/1,121,472,001.20
  6. Step 6: Final answer
    x = 956,613,889.80

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Double scale
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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.