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Finding the Fourth Proportional to 922.52, 1,383.72 and 489.92

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Solution

The fourth proportional to 922.52, 1,383.72 and 489.92 is: 734.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    922.52 : 1,383.72 = 489.92 : x
  2. Step 2: Convert to fraction form
    922.52/1,383.72 = 489.92/x
  3. Step 3: Cross multiply
    922.52x = 1,383.72 × 489.92
  4. Step 4: Simplify right side
    922.52x = 677,912.10
  5. Step 5: Solve for x
    x = 677,912.10/922.52
  6. Step 6: Final answer
    x = 734.85

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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.