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Finding the Fourth Proportional to 747.14, 1,031.46 and 572.78

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Solution

The fourth proportional to 747.14, 1,031.46 and 572.78 is: 790.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    747.14 : 1,031.46 = 572.78 : x
  2. Step 2: Convert to fraction form
    747.14/1,031.46 = 572.78/x
  3. Step 3: Cross multiply
    747.14x = 1,031.46 × 572.78
  4. Step 4: Simplify right side
    747.14x = 590,799.66
  5. Step 5: Solve for x
    x = 590,799.66/747.14
  6. Step 6: Final answer
    x = 790.75

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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.