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Finding the Fourth Proportional to 391,939.04, 587,442 and 272,966.24

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Solution

The fourth proportional to 391,939.04, 587,442 and 272,966.24 is: 409,124.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,939.04 : 587,442 = 272,966.24 : x
  2. Step 2: Convert to fraction form
    391,939.04/587,442 = 272,966.24/x
  3. Step 3: Cross multiply
    391,939.04x = 587,442 × 272,966.24
  4. Step 4: Simplify right side
    391,939.04x = 160,351,833,958.08
  5. Step 5: Solve for x
    x = 160,351,833,958.08/391,939.04
  6. Step 6: Final answer
    x = 409,124.42

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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.