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Finding the Fourth Proportional to 268.44, 370.17 and 189.78

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Solution

The fourth proportional to 268.44, 370.17 and 189.78 is: 261.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.44 : 370.17 = 189.78 : x
  2. Step 2: Convert to fraction form
    268.44/370.17 = 189.78/x
  3. Step 3: Cross multiply
    268.44x = 370.17 × 189.78
  4. Step 4: Simplify right side
    268.44x = 70,250.86
  5. Step 5: Solve for x
    x = 70,250.86/268.44
  6. Step 6: Final answer
    x = 261.70

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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.