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Finding the Fourth Proportional to 391,527.40, 587,291.10 and 385,306.60

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Solution

The fourth proportional to 391,527.40, 587,291.10 and 385,306.60 is: 577,959.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,527.40 : 587,291.10 = 385,306.60 : x
  2. Step 2: Convert to fraction form
    391,527.40/587,291.10 = 385,306.60/x
  3. Step 3: Cross multiply
    391,527.40x = 587,291.10 × 385,306.60
  4. Step 4: Simplify right side
    391,527.40x = 226,287,136,951.26
  5. Step 5: Solve for x
    x = 226,287,136,951.26/391,527.40
  6. Step 6: Final answer
    x = 577,959.90

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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.