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Finding the Fourth Proportional to 801.66, 1,104.39 and 615.42

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Solution

The fourth proportional to 801.66, 1,104.39 and 615.42 is: 847.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    801.66 : 1,104.39 = 615.42 : x
  2. Step 2: Convert to fraction form
    801.66/1,104.39 = 615.42/x
  3. Step 3: Cross multiply
    801.66x = 1,104.39 × 615.42
  4. Step 4: Simplify right side
    801.66x = 679,663.69
  5. Step 5: Solve for x
    x = 679,663.69/801.66
  6. Step 6: Final answer
    x = 847.82

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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.