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Finding the Fourth Proportional to 927.46, 1,391.55 and 494.38

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Solution

The fourth proportional to 927.46, 1,391.55 and 494.38 is: 741.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    927.46 : 1,391.55 = 494.38 : x
  2. Step 2: Convert to fraction form
    927.46/1,391.55 = 494.38/x
  3. Step 3: Cross multiply
    927.46x = 1,391.55 × 494.38
  4. Step 4: Simplify right side
    927.46x = 687,954.49
  5. Step 5: Solve for x
    x = 687,954.49/927.46
  6. Step 6: Final answer
    x = 741.76

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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.