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Finding the Third Proportional to 240.75 and 430.38

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Solution

The third proportional to 240.75 and 430.38 is: 769.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    240.75 : 430.38 = 430.38 : x
  2. Step 2: Convert to fraction form
    240.75/430.38 = 430.38/x
  3. Step 3: Cross multiply
    240.75x = 430.38 × 430.38
  4. Step 4: Simplify right side
    240.75x = 185,222.64
  5. Step 5: Solve for x
    x = 185,222.64/240.75
  6. Step 6: Final answer
    x = 769.36

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Why These Related Problems?

These problems maintain the same ratio (1.79) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.