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Finding the Fourth Proportional to 256.27, 384.63 and 169.36

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Solution

The fourth proportional to 256.27, 384.63 and 169.36 is: 254.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.27 : 384.63 = 169.36 : x
  2. Step 2: Convert to fraction form
    256.27/384.63 = 169.36/x
  3. Step 3: Cross multiply
    256.27x = 384.63 × 169.36
  4. Step 4: Simplify right side
    256.27x = 65,140.94
  5. Step 5: Solve for x
    x = 65,140.94/256.27
  6. Step 6: Final answer
    x = 254.19

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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.