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Finding the Fourth Proportional to 391,555.68, 587,376.16 and 125,253.60

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Solution

The fourth proportional to 391,555.68, 587,376.16 and 125,253.60 is: 187,894.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,555.68 : 587,376.16 = 125,253.60 : x
  2. Step 2: Convert to fraction form
    391,555.68/587,376.16 = 125,253.60/x
  3. Step 3: Cross multiply
    391,555.68x = 587,376.16 × 125,253.60
  4. Step 4: Simplify right side
    391,555.68x = 73,570,978,594.18
  5. Step 5: Solve for x
    x = 73,570,978,594.18/391,555.68
  6. Step 6: Final answer
    x = 187,894.04

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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.