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Finding the Fourth Proportional to 641.98, 961.17 and 534.16

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Solution

The fourth proportional to 641.98, 961.17 and 534.16 is: 799.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.98 : 961.17 = 534.16 : x
  2. Step 2: Convert to fraction form
    641.98/961.17 = 534.16/x
  3. Step 3: Cross multiply
    641.98x = 961.17 × 534.16
  4. Step 4: Simplify right side
    641.98x = 513,418.57
  5. Step 5: Solve for x
    x = 513,418.57/641.98
  6. Step 6: Final answer
    x = 799.74

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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.