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Finding the Fourth Proportional to 717.72, 1,073.88 and 425.39

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Solution

The fourth proportional to 717.72, 1,073.88 and 425.39 is: 636.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    717.72 : 1,073.88 = 425.39 : x
  2. Step 2: Convert to fraction form
    717.72/1,073.88 = 425.39/x
  3. Step 3: Cross multiply
    717.72x = 1,073.88 × 425.39
  4. Step 4: Simplify right side
    717.72x = 456,812.44
  5. Step 5: Solve for x
    x = 456,812.44/717.72
  6. Step 6: Final answer
    x = 636.48

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.