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Finding the Fourth Proportional to 824.97, 1,138.82 and 615.81

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Solution

The fourth proportional to 824.97, 1,138.82 and 615.81 is: 850.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    824.97 : 1,138.82 = 615.81 : x
  2. Step 2: Convert to fraction form
    824.97/1,138.82 = 615.81/x
  3. Step 3: Cross multiply
    824.97x = 1,138.82 × 615.81
  4. Step 4: Simplify right side
    824.97x = 701,293.67
  5. Step 5: Solve for x
    x = 701,293.67/824.97
  6. Step 6: Final answer
    x = 850.08

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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.