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Finding the Third Proportional to 28.50 and 39.63

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Solution

The third proportional to 28.50 and 39.63 is: 55.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28.50 : 39.63 = 39.63 : x
  2. Step 2: Convert to fraction form
    28.50/39.63 = 39.63/x
  3. Step 3: Cross multiply
    28.50x = 39.63 × 39.63
  4. Step 4: Simplify right side
    28.50x = 1,570.14
  5. Step 5: Solve for x
    x = 1,570.14/28.50
  6. Step 6: Final answer
    x = 55.09

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.