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Finding the Fourth Proportional to 353.32, 487.68 and 248.43

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Solution

The fourth proportional to 353.32, 487.68 and 248.43 is: 342.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.32 : 487.68 = 248.43 : x
  2. Step 2: Convert to fraction form
    353.32/487.68 = 248.43/x
  3. Step 3: Cross multiply
    353.32x = 487.68 × 248.43
  4. Step 4: Simplify right side
    353.32x = 121,153.72
  5. Step 5: Solve for x
    x = 121,153.72/353.32
  6. Step 6: Final answer
    x = 342.90

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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.