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Finding the Fourth Proportional to 268.80, 370.95 and 158.28

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Solution

The fourth proportional to 268.80, 370.95 and 158.28 is: 218.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.80 : 370.95 = 158.28 : x
  2. Step 2: Convert to fraction form
    268.80/370.95 = 158.28/x
  3. Step 3: Cross multiply
    268.80x = 370.95 × 158.28
  4. Step 4: Simplify right side
    268.80x = 58,713.97
  5. Step 5: Solve for x
    x = 58,713.97/268.80
  6. Step 6: Final answer
    x = 218.43

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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.