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Finding the Fourth Proportional to 391,795.34, 587,348.40 and 155,304.02

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Solution

The fourth proportional to 391,795.34, 587,348.40 and 155,304.02 is: 232,819.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,795.34 : 587,348.40 = 155,304.02 : x
  2. Step 2: Convert to fraction form
    391,795.34/587,348.40 = 155,304.02/x
  3. Step 3: Cross multiply
    391,795.34x = 587,348.40 × 155,304.02
  4. Step 4: Simplify right side
    391,795.34x = 91,217,567,660.57
  5. Step 5: Solve for x
    x = 91,217,567,660.57/391,795.34
  6. Step 6: Final answer
    x = 232,819.43

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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.