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Finding the Fourth Proportional to 391,040.10, 586,560.15 and 124,809.30

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Solution

The fourth proportional to 391,040.10, 586,560.15 and 124,809.30 is: 187,213.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,040.10 : 586,560.15 = 124,809.30 : x
  2. Step 2: Convert to fraction form
    391,040.10/586,560.15 = 124,809.30/x
  3. Step 3: Cross multiply
    391,040.10x = 586,560.15 × 124,809.30
  4. Step 4: Simplify right side
    391,040.10x = 73,208,161,729.40
  5. Step 5: Solve for x
    x = 73,208,161,729.40/391,040.10
  6. Step 6: Final answer
    x = 187,213.95

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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.