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Finding the Fourth Proportional to 681.46, 938.04 and 484.66

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Solution

The fourth proportional to 681.46, 938.04 and 484.66 is: 667.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.46 : 938.04 = 484.66 : x
  2. Step 2: Convert to fraction form
    681.46/938.04 = 484.66/x
  3. Step 3: Cross multiply
    681.46x = 938.04 × 484.66
  4. Step 4: Simplify right side
    681.46x = 454,630.47
  5. Step 5: Solve for x
    x = 454,630.47/681.46
  6. Step 6: Final answer
    x = 667.14

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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.