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Finding the Fourth Proportional to 1,414.64, 2,122.07 and 489.82

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Solution

The fourth proportional to 1,414.64, 2,122.07 and 489.82 is: 734.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,414.64 : 2,122.07 = 489.82 : x
  2. Step 2: Convert to fraction form
    1,414.64/2,122.07 = 489.82/x
  3. Step 3: Cross multiply
    1,414.64x = 2,122.07 × 489.82
  4. Step 4: Simplify right side
    1,414.64x = 1,039,432.33
  5. Step 5: Solve for x
    x = 1,039,432.33/1,414.64
  6. Step 6: Final answer
    x = 734.77

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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.