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Finding the Fourth Proportional to 391,127.90, 586,686.90 and 124,885.04

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Solution

The fourth proportional to 391,127.90, 586,686.90 and 124,885.04 is: 187,325.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,127.90 : 586,686.90 = 124,885.04 : x
  2. Step 2: Convert to fraction form
    391,127.90/586,686.90 = 124,885.04/x
  3. Step 3: Cross multiply
    391,127.90x = 586,686.90 × 124,885.04
  4. Step 4: Simplify right side
    391,127.90x = 73,268,418,440.69
  5. Step 5: Solve for x
    x = 73,268,418,440.69/391,127.90
  6. Step 6: Final answer
    x = 187,325.98

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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.