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Finding the Fourth Proportional to 615.38, 849.22 and 408.38

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Solution

The fourth proportional to 615.38, 849.22 and 408.38 is: 563.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.38 : 849.22 = 408.38 : x
  2. Step 2: Convert to fraction form
    615.38/849.22 = 408.38/x
  3. Step 3: Cross multiply
    615.38x = 849.22 × 408.38
  4. Step 4: Simplify right side
    615.38x = 346,799.20
  5. Step 5: Solve for x
    x = 346,799.20/615.38
  6. Step 6: Final answer
    x = 563.56

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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.