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Finding the Third Proportional to 380.88 and 514.75

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Solution

The third proportional to 380.88 and 514.75 is: 695.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.88 : 514.75 = 514.75 : x
  2. Step 2: Convert to fraction form
    380.88/514.75 = 514.75/x
  3. Step 3: Cross multiply
    380.88x = 514.75 × 514.75
  4. Step 4: Simplify right side
    380.88x = 264,967.56
  5. Step 5: Solve for x
    x = 264,967.56/380.88
  6. Step 6: Final answer
    x = 695.68

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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.