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Finding the Third Proportional to 64.13 and 138.30

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Solution

The third proportional to 64.13 and 138.30 is: 298.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.13 : 138.30 = 138.30 : x
  2. Step 2: Convert to fraction form
    64.13/138.30 = 138.30/x
  3. Step 3: Cross multiply
    64.13x = 138.30 × 138.30
  4. Step 4: Simplify right side
    64.13x = 19,128.19
  5. Step 5: Solve for x
    x = 19,128.19/64.13
  6. Step 6: Final answer
    x = 298.30

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.