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Finding the Fourth Proportional to 934.17, 1,287.39 and 671.73

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Solution

The fourth proportional to 934.17, 1,287.39 and 671.73 is: 925.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    934.17 : 1,287.39 = 671.73 : x
  2. Step 2: Convert to fraction form
    934.17/1,287.39 = 671.73/x
  3. Step 3: Cross multiply
    934.17x = 1,287.39 × 671.73
  4. Step 4: Simplify right side
    934.17x = 864,778.48
  5. Step 5: Solve for x
    x = 864,778.48/934.17
  6. Step 6: Final answer
    x = 925.72

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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.