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Finding the Fourth Proportional to 1,366.70, 2,049.92 and 442

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Solution

The fourth proportional to 1,366.70, 2,049.92 and 442 is: 662.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,366.70 : 2,049.92 = 442 : x
  2. Step 2: Convert to fraction form
    1,366.70/2,049.92 = 442/x
  3. Step 3: Cross multiply
    1,366.70x = 2,049.92 × 442
  4. Step 4: Simplify right side
    1,366.70x = 906,062.43
  5. Step 5: Solve for x
    x = 906,062.43/1,366.70
  6. Step 6: Final answer
    x = 662.96

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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.