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Finding the Fourth Proportional to 256.12, 353.53 and 203.76

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Solution

The fourth proportional to 256.12, 353.53 and 203.76 is: 281.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.12 : 353.53 = 203.76 : x
  2. Step 2: Convert to fraction form
    256.12/353.53 = 203.76/x
  3. Step 3: Cross multiply
    256.12x = 353.53 × 203.76
  4. Step 4: Simplify right side
    256.12x = 72,035.27
  5. Step 5: Solve for x
    x = 72,035.27/256.12
  6. Step 6: Final answer
    x = 281.26

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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.