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Finding the Fourth Proportional to 1,791.91, 2,472.79 and 1,045.90

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Solution

The fourth proportional to 1,791.91, 2,472.79 and 1,045.90 is: 1,443.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,791.91 : 2,472.79 = 1,045.90 : x
  2. Step 2: Convert to fraction form
    1,791.91/2,472.79 = 1,045.90/x
  3. Step 3: Cross multiply
    1,791.91x = 2,472.79 × 1,045.90
  4. Step 4: Simplify right side
    1,791.91x = 2,586,291.06
  5. Step 5: Solve for x
    x = 2,586,291.06/1,791.91
  6. Step 6: Final answer
    x = 1,443.32

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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.