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Finding the Fourth Proportional to 1,791.68, 2,472.39 and 1,005.71

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Solution

The fourth proportional to 1,791.68, 2,472.39 and 1,005.71 is: 1,387.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,791.68 : 2,472.39 = 1,005.71 : x
  2. Step 2: Convert to fraction form
    1,791.68/2,472.39 = 1,005.71/x
  3. Step 3: Cross multiply
    1,791.68x = 2,472.39 × 1,005.71
  4. Step 4: Simplify right side
    1,791.68x = 2,486,494.98
  5. Step 5: Solve for x
    x = 2,486,494.98/1,791.68
  6. Step 6: Final answer
    x = 1,387.80

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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.