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Finding the Fourth Proportional to 819.52, 1,131.24 and 558.88

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Solution

The fourth proportional to 819.52, 1,131.24 and 558.88 is: 771.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    819.52 : 1,131.24 = 558.88 : x
  2. Step 2: Convert to fraction form
    819.52/1,131.24 = 558.88/x
  3. Step 3: Cross multiply
    819.52x = 1,131.24 × 558.88
  4. Step 4: Simplify right side
    819.52x = 632,227.41
  5. Step 5: Solve for x
    x = 632,227.41/819.52
  6. Step 6: Final answer
    x = 771.46

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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.