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Finding the Fourth Proportional to 925.72, 1,388.58 and 267.61

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Solution

The fourth proportional to 925.72, 1,388.58 and 267.61 is: 401.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    925.72 : 1,388.58 = 267.61 : x
  2. Step 2: Convert to fraction form
    925.72/1,388.58 = 267.61/x
  3. Step 3: Cross multiply
    925.72x = 1,388.58 × 267.61
  4. Step 4: Simplify right side
    925.72x = 371,597.89
  5. Step 5: Solve for x
    x = 371,597.89/925.72
  6. Step 6: Final answer
    x = 401.42

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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.