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Finding the Third Proportional to 130.50 and 202.88

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Solution

The third proportional to 130.50 and 202.88 is: 315.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.50 : 202.88 = 202.88 : x
  2. Step 2: Convert to fraction form
    130.50/202.88 = 202.88/x
  3. Step 3: Cross multiply
    130.50x = 202.88 × 202.88
  4. Step 4: Simplify right side
    130.50x = 41,158.27
  5. Step 5: Solve for x
    x = 41,158.27/130.50
  6. Step 6: Final answer
    x = 315.39

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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.