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Finding the Fourth Proportional to 656,711.56, 985,123.20 and 207,312.20

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Solution

The fourth proportional to 656,711.56, 985,123.20 and 207,312.20 is: 310,985.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,711.56 : 985,123.20 = 207,312.20 : x
  2. Step 2: Convert to fraction form
    656,711.56/985,123.20 = 207,312.20/x
  3. Step 3: Cross multiply
    656,711.56x = 985,123.20 × 207,312.20
  4. Step 4: Simplify right side
    656,711.56x = 204,228,057,863.04
  5. Step 5: Solve for x
    x = 204,228,057,863.04/656,711.56
  6. Step 6: Final answer
    x = 310,985.93

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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.