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Finding the Fourth Proportional to 224.31, 336.39 and 87.40

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Solution

The fourth proportional to 224.31, 336.39 and 87.40 is: 131.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    224.31 : 336.39 = 87.40 : x
  2. Step 2: Convert to fraction form
    224.31/336.39 = 87.40/x
  3. Step 3: Cross multiply
    224.31x = 336.39 × 87.40
  4. Step 4: Simplify right side
    224.31x = 29,400.49
  5. Step 5: Solve for x
    x = 29,400.49/224.31
  6. Step 6: Final answer
    x = 131.07

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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.