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Finding the Third Proportional to 400.75 and 540.25

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Solution

The third proportional to 400.75 and 540.25 is: 728.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.75 : 540.25 = 540.25 : x
  2. Step 2: Convert to fraction form
    400.75/540.25 = 540.25/x
  3. Step 3: Cross multiply
    400.75x = 540.25 × 540.25
  4. Step 4: Simplify right side
    400.75x = 291,870.06
  5. Step 5: Solve for x
    x = 291,870.06/400.75
  6. Step 6: Final answer
    x = 728.31

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.