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Finding the Third Proportional to 39.51 and 59.80

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Solution

The third proportional to 39.51 and 59.80 is: 90.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    39.51 : 59.80 = 59.80 : x
  2. Step 2: Convert to fraction form
    39.51/59.80 = 59.80/x
  3. Step 3: Cross multiply
    39.51x = 59.80 × 59.80
  4. Step 4: Simplify right side
    39.51x = 3,576.13
  5. Step 5: Solve for x
    x = 3,576.13/39.51
  6. Step 6: Final answer
    x = 90.51

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.