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Finding the Fourth Proportional to 641.11, 959.82 and 486.13

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Solution

The fourth proportional to 641.11, 959.82 and 486.13 is: 727.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    641.11 : 959.82 = 486.13 : x
  2. Step 2: Convert to fraction form
    641.11/959.82 = 486.13/x
  3. Step 3: Cross multiply
    641.11x = 959.82 × 486.13
  4. Step 4: Simplify right side
    641.11x = 466,597.30
  5. Step 5: Solve for x
    x = 466,597.30/641.11
  6. Step 6: Final answer
    x = 727.80

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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.