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Finding the Fourth Proportional to 256.72, 383.22 and 248.16

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Solution

The fourth proportional to 256.72, 383.22 and 248.16 is: 370.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.72 : 383.22 = 248.16 : x
  2. Step 2: Convert to fraction form
    256.72/383.22 = 248.16/x
  3. Step 3: Cross multiply
    256.72x = 383.22 × 248.16
  4. Step 4: Simplify right side
    256.72x = 95,099.88
  5. Step 5: Solve for x
    x = 95,099.88/256.72
  6. Step 6: Final answer
    x = 370.44

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.