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Finding the Fourth Proportional to 256.20, 383.52 and 174.81

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Solution

The fourth proportional to 256.20, 383.52 and 174.81 is: 261.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.20 : 383.52 = 174.81 : x
  2. Step 2: Convert to fraction form
    256.20/383.52 = 174.81/x
  3. Step 3: Cross multiply
    256.20x = 383.52 × 174.81
  4. Step 4: Simplify right side
    256.20x = 67,043.13
  5. Step 5: Solve for x
    x = 67,043.13/256.20
  6. Step 6: Final answer
    x = 261.68

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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.