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Finding the Fourth Proportional to 256.68, 353.88 and 177.84

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Solution

The fourth proportional to 256.68, 353.88 and 177.84 is: 245.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.68 : 353.88 = 177.84 : x
  2. Step 2: Convert to fraction form
    256.68/353.88 = 177.84/x
  3. Step 3: Cross multiply
    256.68x = 353.88 × 177.84
  4. Step 4: Simplify right side
    256.68x = 62,934.02
  5. Step 5: Solve for x
    x = 62,934.02/256.68
  6. Step 6: Final answer
    x = 245.18

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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.