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Finding the Third Proportional to 155.25 and 240.19

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Solution

The third proportional to 155.25 and 240.19 is: 371.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.25 : 240.19 = 240.19 : x
  2. Step 2: Convert to fraction form
    155.25/240.19 = 240.19/x
  3. Step 3: Cross multiply
    155.25x = 240.19 × 240.19
  4. Step 4: Simplify right side
    155.25x = 57,690.04
  5. Step 5: Solve for x
    x = 57,690.04/155.25
  6. Step 6: Final answer
    x = 371.59

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.