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Finding the Fourth Proportional to 257.84, 353.92 and 229.60

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Solution

The fourth proportional to 257.84, 353.92 and 229.60 is: 315.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    257.84 : 353.92 = 229.60 : x
  2. Step 2: Convert to fraction form
    257.84/353.92 = 229.60/x
  3. Step 3: Cross multiply
    257.84x = 353.92 × 229.60
  4. Step 4: Simplify right side
    257.84x = 81,260.03
  5. Step 5: Solve for x
    x = 81,260.03/257.84
  6. Step 6: Final answer
    x = 315.16

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.