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Finding the Fourth Proportional to 256.33, 384.18 and 112.15

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Solution

The fourth proportional to 256.33, 384.18 and 112.15 is: 168.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.33 : 384.18 = 112.15 : x
  2. Step 2: Convert to fraction form
    256.33/384.18 = 112.15/x
  3. Step 3: Cross multiply
    256.33x = 384.18 × 112.15
  4. Step 4: Simplify right side
    256.33x = 43,085.79
  5. Step 5: Solve for x
    x = 43,085.79/256.33
  6. Step 6: Final answer
    x = 168.09

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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.