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Finding the Third Proportional to 135 and 240.50

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Solution

The third proportional to 135 and 240.50 is: 428.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    135 : 240.50 = 240.50 : x
  2. Step 2: Convert to fraction form
    135/240.50 = 240.50/x
  3. Step 3: Cross multiply
    135x = 240.50 × 240.50
  4. Step 4: Simplify right side
    135x = 57,840.25
  5. Step 5: Solve for x
    x = 57,840.25/135
  6. Step 6: Final answer
    x = 428.45

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Why These Related Problems?

These problems maintain the same ratio (1.78) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.