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Finding the Fourth Proportional to 1,127.52, 1,690.48 and 579.44

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Solution

The fourth proportional to 1,127.52, 1,690.48 and 579.44 is: 868.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,127.52 : 1,690.48 = 579.44 : x
  2. Step 2: Convert to fraction form
    1,127.52/1,690.48 = 579.44/x
  3. Step 3: Cross multiply
    1,127.52x = 1,690.48 × 579.44
  4. Step 4: Simplify right side
    1,127.52x = 979,531.73
  5. Step 5: Solve for x
    x = 979,531.73/1,127.52
  6. Step 6: Final answer
    x = 868.75

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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.