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Finding the Fourth Proportional to 1,488.43, 2,236.12 and 872.56

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Solution

The fourth proportional to 1,488.43, 2,236.12 and 872.56 is: 1,310.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,488.43 : 2,236.12 = 872.56 : x
  2. Step 2: Convert to fraction form
    1,488.43/2,236.12 = 872.56/x
  3. Step 3: Cross multiply
    1,488.43x = 2,236.12 × 872.56
  4. Step 4: Simplify right side
    1,488.43x = 1,951,148.87
  5. Step 5: Solve for x
    x = 1,951,148.87/1,488.43
  6. Step 6: Final answer
    x = 1,310.88

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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.