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Finding the Fourth Proportional to 256.97, 384.94 and 170.04

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Solution

The fourth proportional to 256.97, 384.94 and 170.04 is: 254.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.97 : 384.94 = 170.04 : x
  2. Step 2: Convert to fraction form
    256.97/384.94 = 170.04/x
  3. Step 3: Cross multiply
    256.97x = 384.94 × 170.04
  4. Step 4: Simplify right side
    256.97x = 65,455.20
  5. Step 5: Solve for x
    x = 65,455.20/256.97
  6. Step 6: Final answer
    x = 254.72

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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.