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Finding the Fourth Proportional to 479,138.40, 718,246.80 and 372,463.20

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Solution

The fourth proportional to 479,138.40, 718,246.80 and 372,463.20 is: 558,336.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,138.40 : 718,246.80 = 372,463.20 : x
  2. Step 2: Convert to fraction form
    479,138.40/718,246.80 = 372,463.20/x
  3. Step 3: Cross multiply
    479,138.40x = 718,246.80 × 372,463.20
  4. Step 4: Simplify right side
    479,138.40x = 267,520,501,517.76
  5. Step 5: Solve for x
    x = 267,520,501,517.76/479,138.40
  6. Step 6: Final answer
    x = 558,336.59

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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.