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Finding the Fourth Proportional to 391,976.80, 587,187.60 and 233,735.20

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Solution

The fourth proportional to 391,976.80, 587,187.60 and 233,735.20 is: 350,139.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,976.80 : 587,187.60 = 233,735.20 : x
  2. Step 2: Convert to fraction form
    391,976.80/587,187.60 = 233,735.20/x
  3. Step 3: Cross multiply
    391,976.80x = 587,187.60 × 233,735.20
  4. Step 4: Simplify right side
    391,976.80x = 137,246,411,123.52
  5. Step 5: Solve for x
    x = 137,246,411,123.52/391,976.80
  6. Step 6: Final answer
    x = 350,139.12

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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.