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Finding the Fourth Proportional to 268.19, 369.94 and 169.78

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Solution

The fourth proportional to 268.19, 369.94 and 169.78 is: 234.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.19 : 369.94 = 169.78 : x
  2. Step 2: Convert to fraction form
    268.19/369.94 = 169.78/x
  3. Step 3: Cross multiply
    268.19x = 369.94 × 169.78
  4. Step 4: Simplify right side
    268.19x = 62,805.71
  5. Step 5: Solve for x
    x = 62,805.71/268.19
  6. Step 6: Final answer
    x = 234.18

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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.