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Finding the Fourth Proportional to 256.80, 354.56 and 234.88

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Solution

The fourth proportional to 256.80, 354.56 and 234.88 is: 324.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.80 : 354.56 = 234.88 : x
  2. Step 2: Convert to fraction form
    256.80/354.56 = 234.88/x
  3. Step 3: Cross multiply
    256.80x = 354.56 × 234.88
  4. Step 4: Simplify right side
    256.80x = 83,279.05
  5. Step 5: Solve for x
    x = 83,279.05/256.80
  6. Step 6: Final answer
    x = 324.30

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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.