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Finding the Fourth Proportional to 747.76, 1,031.89 and 416.18

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Solution

The fourth proportional to 747.76, 1,031.89 and 416.18 is: 574.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    747.76 : 1,031.89 = 416.18 : x
  2. Step 2: Convert to fraction form
    747.76/1,031.89 = 416.18/x
  3. Step 3: Cross multiply
    747.76x = 1,031.89 × 416.18
  4. Step 4: Simplify right side
    747.76x = 429,451.98
  5. Step 5: Solve for x
    x = 429,451.98/747.76
  6. Step 6: Final answer
    x = 574.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.