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Finding the Fourth Proportional to 615.38, 849.17 and 379.29

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Solution

The fourth proportional to 615.38, 849.17 and 379.29 is: 523.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.38 : 849.17 = 379.29 : x
  2. Step 2: Convert to fraction form
    615.38/849.17 = 379.29/x
  3. Step 3: Cross multiply
    615.38x = 849.17 × 379.29
  4. Step 4: Simplify right side
    615.38x = 322,081.69
  5. Step 5: Solve for x
    x = 322,081.69/615.38
  6. Step 6: Final answer
    x = 523.39

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Double scale
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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.