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Finding the Fourth Proportional to 391,336.52, 587,267.88 and 138,616.16

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Solution

The fourth proportional to 391,336.52, 587,267.88 and 138,616.16 is: 208,017.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,336.52 : 587,267.88 = 138,616.16 : x
  2. Step 2: Convert to fraction form
    391,336.52/587,267.88 = 138,616.16/x
  3. Step 3: Cross multiply
    391,336.52x = 587,267.88 × 138,616.16
  4. Step 4: Simplify right side
    391,336.52x = 81,404,818,416.94
  5. Step 5: Solve for x
    x = 81,404,818,416.94/391,336.52
  6. Step 6: Final answer
    x = 208,017.43

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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.