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Finding the Fourth Proportional to 268.20, 369.96 and 151.68

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Solution

The fourth proportional to 268.20, 369.96 and 151.68 is: 209.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.20 : 369.96 = 151.68 : x
  2. Step 2: Convert to fraction form
    268.20/369.96 = 151.68/x
  3. Step 3: Cross multiply
    268.20x = 369.96 × 151.68
  4. Step 4: Simplify right side
    268.20x = 56,115.53
  5. Step 5: Solve for x
    x = 56,115.53/268.20
  6. Step 6: Final answer
    x = 209.23

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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.