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Finding the Fourth Proportional to 391,963.60, 587,799.60 and 155,257.30

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Solution

The fourth proportional to 391,963.60, 587,799.60 and 155,257.30 is: 232,828.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,963.60 : 587,799.60 = 155,257.30 : x
  2. Step 2: Convert to fraction form
    391,963.60/587,799.60 = 155,257.30/x
  3. Step 3: Cross multiply
    391,963.60x = 587,799.60 × 155,257.30
  4. Step 4: Simplify right side
    391,963.60x = 91,260,178,837.08
  5. Step 5: Solve for x
    x = 91,260,178,837.08/391,963.60
  6. Step 6: Final answer
    x = 232,828.20

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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.