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Finding the Fourth Proportional to 984.13, 1,474.36 and 489.97

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Solution

The fourth proportional to 984.13, 1,474.36 and 489.97 is: 734.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    984.13 : 1,474.36 = 489.97 : x
  2. Step 2: Convert to fraction form
    984.13/1,474.36 = 489.97/x
  3. Step 3: Cross multiply
    984.13x = 1,474.36 × 489.97
  4. Step 4: Simplify right side
    984.13x = 722,392.17
  5. Step 5: Solve for x
    x = 722,392.17/984.13
  6. Step 6: Final answer
    x = 734.04

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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.