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Finding the Fourth Proportional to 445.91, 615.31 and 249.38

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Solution

The fourth proportional to 445.91, 615.31 and 249.38 is: 344.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.91 : 615.31 = 249.38 : x
  2. Step 2: Convert to fraction form
    445.91/615.31 = 249.38/x
  3. Step 3: Cross multiply
    445.91x = 615.31 × 249.38
  4. Step 4: Simplify right side
    445.91x = 153,442.31
  5. Step 5: Solve for x
    x = 153,442.31/445.91
  6. Step 6: Final answer
    x = 344.11

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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.