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Finding the Third Proportional to 142.25 and 202.50

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Solution

The third proportional to 142.25 and 202.50 is: 288.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    142.25 : 202.50 = 202.50 : x
  2. Step 2: Convert to fraction form
    142.25/202.50 = 202.50/x
  3. Step 3: Cross multiply
    142.25x = 202.50 × 202.50
  4. Step 4: Simplify right side
    142.25x = 41,006.25
  5. Step 5: Solve for x
    x = 41,006.25/142.25
  6. Step 6: Final answer
    x = 288.27

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.