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Finding the Fourth Proportional to 1,118.40, 1,542.62 and 675.74

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Solution

The fourth proportional to 1,118.40, 1,542.62 and 675.74 is: 932.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,118.40 : 1,542.62 = 675.74 : x
  2. Step 2: Convert to fraction form
    1,118.40/1,542.62 = 675.74/x
  3. Step 3: Cross multiply
    1,118.40x = 1,542.62 × 675.74
  4. Step 4: Simplify right side
    1,118.40x = 1,042,398.95
  5. Step 5: Solve for x
    x = 1,042,398.95/1,118.40
  6. Step 6: Final answer
    x = 932.04

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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.