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Finding the Fourth Proportional to 1,432.20, 1,976.66 and 873.24

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Solution

The fourth proportional to 1,432.20, 1,976.66 and 873.24 is: 1,205.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,432.20 : 1,976.66 = 873.24 : x
  2. Step 2: Convert to fraction form
    1,432.20/1,976.66 = 873.24/x
  3. Step 3: Cross multiply
    1,432.20x = 1,976.66 × 873.24
  4. Step 4: Simplify right side
    1,432.20x = 1,726,098.58
  5. Step 5: Solve for x
    x = 1,726,098.58/1,432.20
  6. Step 6: Final answer
    x = 1,205.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.