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Finding the Fourth Proportional to 801.93, 1,107.28 and 615.12

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Solution

The fourth proportional to 801.93, 1,107.28 and 615.12 is: 849.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    801.93 : 1,107.28 = 615.12 : x
  2. Step 2: Convert to fraction form
    801.93/1,107.28 = 615.12/x
  3. Step 3: Cross multiply
    801.93x = 1,107.28 × 615.12
  4. Step 4: Simplify right side
    801.93x = 681,110.67
  5. Step 5: Solve for x
    x = 681,110.67/801.93
  6. Step 6: Final answer
    x = 849.34

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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.