Home / 645,931.40-968,897.10-505,809.80

Finding the Fourth Proportional to 645,931.40, 968,897.10 and 505,809.80

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Solution

The fourth proportional to 645,931.40, 968,897.10 and 505,809.80 is: 758,714.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,931.40 : 968,897.10 = 505,809.80 : x
  2. Step 2: Convert to fraction form
    645,931.40/968,897.10 = 505,809.80/x
  3. Step 3: Cross multiply
    645,931.40x = 968,897.10 × 505,809.80
  4. Step 4: Simplify right side
    645,931.40x = 490,077,648,371.58
  5. Step 5: Solve for x
    x = 490,077,648,371.58/645,931.40
  6. Step 6: Final answer
    x = 758,714.70

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Half scale
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Double scale
Find fourth proportional to 645,932.40, 968,898.60 and 505,810.80
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.