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Finding the Fourth Proportional to 256.97, 385.26 and 102.94

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Solution

The fourth proportional to 256.97, 385.26 and 102.94 is: 154.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    256.97 : 385.26 = 102.94 : x
  2. Step 2: Convert to fraction form
    256.97/385.26 = 102.94/x
  3. Step 3: Cross multiply
    256.97x = 385.26 × 102.94
  4. Step 4: Simplify right side
    256.97x = 39,657.32
  5. Step 5: Solve for x
    x = 39,657.32/256.97
  6. Step 6: Final answer
    x = 154.33

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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.