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Finding the Fourth Proportional to 656,343.40, 984,515.10 and 432,005.80

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Solution

The fourth proportional to 656,343.40, 984,515.10 and 432,005.80 is: 648,008.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,343.40 : 984,515.10 = 432,005.80 : x
  2. Step 2: Convert to fraction form
    656,343.40/984,515.10 = 432,005.80/x
  3. Step 3: Cross multiply
    656,343.40x = 984,515.10 × 432,005.80
  4. Step 4: Simplify right side
    656,343.40x = 425,316,233,387.58
  5. Step 5: Solve for x
    x = 425,316,233,387.58/656,343.40
  6. Step 6: Final answer
    x = 648,008.70

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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.