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Finding the Fourth Proportional to 1,377.62, 2,066.22 and 453

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Solution

The fourth proportional to 1,377.62, 2,066.22 and 453 is: 679.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,377.62 : 2,066.22 = 453 : x
  2. Step 2: Convert to fraction form
    1,377.62/2,066.22 = 453/x
  3. Step 3: Cross multiply
    1,377.62x = 2,066.22 × 453
  4. Step 4: Simplify right side
    1,377.62x = 935,997.66
  5. Step 5: Solve for x
    x = 935,997.66/1,377.62
  6. Step 6: Final answer
    x = 679.43

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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.