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Finding the Fourth Proportional to 256.61, 354.20 and 182.81

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Solution

The fourth proportional to 256.61, 354.20 and 182.81 is: 252.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.61 : 354.20 = 182.81 : x
  2. Step 2: Convert to fraction form
    256.61/354.20 = 182.81/x
  3. Step 3: Cross multiply
    256.61x = 354.20 × 182.81
  4. Step 4: Simplify right side
    256.61x = 64,748.62
  5. Step 5: Solve for x
    x = 64,748.62/256.61
  6. Step 6: Final answer
    x = 252.33

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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.