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Finding the Fourth Proportional to 268.38, 371.04 and 256.90

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Solution

The fourth proportional to 268.38, 371.04 and 256.90 is: 355.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.38 : 371.04 = 256.90 : x
  2. Step 2: Convert to fraction form
    268.38/371.04 = 256.90/x
  3. Step 3: Cross multiply
    268.38x = 371.04 × 256.90
  4. Step 4: Simplify right side
    268.38x = 95,320.18
  5. Step 5: Solve for x
    x = 95,320.18/268.38
  6. Step 6: Final answer
    x = 355.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.