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Finding the Third Proportional to 118.50 and 201.50

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Solution

The third proportional to 118.50 and 201.50 is: 342.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    118.50 : 201.50 = 201.50 : x
  2. Step 2: Convert to fraction form
    118.50/201.50 = 201.50/x
  3. Step 3: Cross multiply
    118.50x = 201.50 × 201.50
  4. Step 4: Simplify right side
    118.50x = 40,602.25
  5. Step 5: Solve for x
    x = 40,602.25/118.50
  6. Step 6: Final answer
    x = 342.64

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Why These Related Problems?

These problems maintain the same ratio (1.70) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.