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Finding the Third Proportional to 39.39 and 52.68

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Solution

The third proportional to 39.39 and 52.68 is: 70.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    39.39 : 52.68 = 52.68 : x
  2. Step 2: Convert to fraction form
    39.39/52.68 = 52.68/x
  3. Step 3: Cross multiply
    39.39x = 52.68 × 52.68
  4. Step 4: Simplify right side
    39.39x = 2,775.36
  5. Step 5: Solve for x
    x = 2,775.36/39.39
  6. Step 6: Final answer
    x = 70.45

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Why These Related Problems?

These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.