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Finding the Fourth Proportional to 224.45, 336.71 and 87.49

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Solution

The fourth proportional to 224.45, 336.71 and 87.49 is: 131.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    224.45 : 336.71 = 87.49 : x
  2. Step 2: Convert to fraction form
    224.45/336.71 = 87.49/x
  3. Step 3: Cross multiply
    224.45x = 336.71 × 87.49
  4. Step 4: Simplify right side
    224.45x = 29,458.76
  5. Step 5: Solve for x
    x = 29,458.76/224.45
  6. Step 6: Final answer
    x = 131.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.