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Finding the Fourth Proportional to 391,506.40, 587,346.95 and 125,282.89

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Solution

The fourth proportional to 391,506.40, 587,346.95 and 125,282.89 is: 187,952.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,506.40 : 587,346.95 = 125,282.89 : x
  2. Step 2: Convert to fraction form
    391,506.40/587,346.95 = 125,282.89/x
  3. Step 3: Cross multiply
    391,506.40x = 587,346.95 × 125,282.89
  4. Step 4: Simplify right side
    391,506.40x = 73,584,523,328.69
  5. Step 5: Solve for x
    x = 73,584,523,328.69/391,506.40
  6. Step 6: Final answer
    x = 187,952.29

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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.