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Finding the Fourth Proportional to 256.59, 385.17 and 134.82

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Solution

The fourth proportional to 256.59, 385.17 and 134.82 is: 202.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.59 : 385.17 = 134.82 : x
  2. Step 2: Convert to fraction form
    256.59/385.17 = 134.82/x
  3. Step 3: Cross multiply
    256.59x = 385.17 × 134.82
  4. Step 4: Simplify right side
    256.59x = 51,927.95
  5. Step 5: Solve for x
    x = 51,927.95/256.59
  6. Step 6: Final answer
    x = 202.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.