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Finding the Fourth Proportional to 747.55, 1,031.16 and 482.34

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Solution

The fourth proportional to 747.55, 1,031.16 and 482.34 is: 665.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    747.55 : 1,031.16 = 482.34 : x
  2. Step 2: Convert to fraction form
    747.55/1,031.16 = 482.34/x
  3. Step 3: Cross multiply
    747.55x = 1,031.16 × 482.34
  4. Step 4: Simplify right side
    747.55x = 497,375.39
  5. Step 5: Solve for x
    x = 497,375.39/747.55
  6. Step 6: Final answer
    x = 665.34

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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.