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Finding the Fourth Proportional to 391,572.80, 587,359.20 and 368,244.80

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Solution

The fourth proportional to 391,572.80, 587,359.20 and 368,244.80 is: 552,367.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,572.80 : 587,359.20 = 368,244.80 : x
  2. Step 2: Convert to fraction form
    391,572.80/587,359.20 = 368,244.80/x
  3. Step 3: Cross multiply
    391,572.80x = 587,359.20 × 368,244.80
  4. Step 4: Simplify right side
    391,572.80x = 216,291,971,132.16
  5. Step 5: Solve for x
    x = 216,291,971,132.16/391,572.80
  6. Step 6: Final answer
    x = 552,367.20

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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.