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Finding the Third Proportional to 124.64 and 262.78

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Solution

The third proportional to 124.64 and 262.78 is: 554.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.64 : 262.78 = 262.78 : x
  2. Step 2: Convert to fraction form
    124.64/262.78 = 262.78/x
  3. Step 3: Cross multiply
    124.64x = 262.78 × 262.78
  4. Step 4: Simplify right side
    124.64x = 69,053.99
  5. Step 5: Solve for x
    x = 69,053.99/124.64
  6. Step 6: Final answer
    x = 554.02

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.