Home / 658,123.80-985,217.40-391,747.20

Finding the Fourth Proportional to 658,123.80, 985,217.40 and 391,747.20

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Solution

The fourth proportional to 658,123.80, 985,217.40 and 391,747.20 is: 586,449.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,123.80 : 985,217.40 = 391,747.20 : x
  2. Step 2: Convert to fraction form
    658,123.80/985,217.40 = 391,747.20/x
  3. Step 3: Cross multiply
    658,123.80x = 985,217.40 × 391,747.20
  4. Step 4: Simplify right side
    658,123.80x = 385,956,157,841.28
  5. Step 5: Solve for x
    x = 385,956,157,841.28/658,123.80
  6. Step 6: Final answer
    x = 586,449.17

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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.