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Finding the Fourth Proportional to 2,479.52, 3,718.80 and 747.68

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Solution

The fourth proportional to 2,479.52, 3,718.80 and 747.68 is: 1,121.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,479.52 : 3,718.80 = 747.68 : x
  2. Step 2: Convert to fraction form
    2,479.52/3,718.80 = 747.68/x
  3. Step 3: Cross multiply
    2,479.52x = 3,718.80 × 747.68
  4. Step 4: Simplify right side
    2,479.52x = 2,780,472.38
  5. Step 5: Solve for x
    x = 2,780,472.38/2,479.52
  6. Step 6: Final answer
    x = 1,121.38

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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.