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Finding the Third Proportional to 115.80 and 256.08

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Solution

The third proportional to 115.80 and 256.08 is: 566.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    115.80 : 256.08 = 256.08 : x
  2. Step 2: Convert to fraction form
    115.80/256.08 = 256.08/x
  3. Step 3: Cross multiply
    115.80x = 256.08 × 256.08
  4. Step 4: Simplify right side
    115.80x = 65,576.01
  5. Step 5: Solve for x
    x = 65,576.01/115.80
  6. Step 6: Final answer
    x = 566.26

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Why These Related Problems?

These problems maintain the same ratio (2.21) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.