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Finding the Fourth Proportional to 681.97, 941.22 and 387.17

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Solution

The fourth proportional to 681.97, 941.22 and 387.17 is: 534.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.97 : 941.22 = 387.17 : x
  2. Step 2: Convert to fraction form
    681.97/941.22 = 387.17/x
  3. Step 3: Cross multiply
    681.97x = 941.22 × 387.17
  4. Step 4: Simplify right side
    681.97x = 364,412.15
  5. Step 5: Solve for x
    x = 364,412.15/681.97
  6. Step 6: Final answer
    x = 534.35

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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.