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Finding the Fourth Proportional to 1,355.13, 2,032.97 and 489.38

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Solution

The fourth proportional to 1,355.13, 2,032.97 and 489.38 is: 734.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,355.13 : 2,032.97 = 489.38 : x
  2. Step 2: Convert to fraction form
    1,355.13/2,032.97 = 489.38/x
  3. Step 3: Cross multiply
    1,355.13x = 2,032.97 × 489.38
  4. Step 4: Simplify right side
    1,355.13x = 994,882.25
  5. Step 5: Solve for x
    x = 994,882.25/1,355.13
  6. Step 6: Final answer
    x = 734.16

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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.