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Finding the Fourth Proportional to 224.12, 309.38 and 135.68

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Solution

The fourth proportional to 224.12, 309.38 and 135.68 is: 187.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    224.12 : 309.38 = 135.68 : x
  2. Step 2: Convert to fraction form
    224.12/309.38 = 135.68/x
  3. Step 3: Cross multiply
    224.12x = 309.38 × 135.68
  4. Step 4: Simplify right side
    224.12x = 41,976.68
  5. Step 5: Solve for x
    x = 41,976.68/224.12
  6. Step 6: Final answer
    x = 187.30

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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.