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Finding the Fourth Proportional to 1,791.60, 2,472.36 and 1,005.72

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Solution

The fourth proportional to 1,791.60, 2,472.36 and 1,005.72 is: 1,387.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,791.60 : 2,472.36 = 1,005.72 : x
  2. Step 2: Convert to fraction form
    1,791.60/2,472.36 = 1,005.72/x
  3. Step 3: Cross multiply
    1,791.60x = 2,472.36 × 1,005.72
  4. Step 4: Simplify right side
    1,791.60x = 2,486,501.90
  5. Step 5: Solve for x
    x = 2,486,501.90/1,791.60
  6. Step 6: Final answer
    x = 1,387.87

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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.