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Finding the Fourth Proportional to 391,128.60, 586,687.94 and 124,885.74

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Solution

The fourth proportional to 391,128.60, 586,687.94 and 124,885.74 is: 187,327.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,128.60 : 586,687.94 = 124,885.74 : x
  2. Step 2: Convert to fraction form
    391,128.60/586,687.94 = 124,885.74/x
  3. Step 3: Cross multiply
    391,128.60x = 586,687.94 × 124,885.74
  4. Step 4: Simplify right side
    391,128.60x = 73,268,957,535.98
  5. Step 5: Solve for x
    x = 73,268,957,535.98/391,128.60
  6. Step 6: Final answer
    x = 187,327.03

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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.