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Finding the Third Proportional to 345 and 375.75

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Solution

The third proportional to 345 and 375.75 is: 409.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    345 : 375.75 = 375.75 : x
  2. Step 2: Convert to fraction form
    345/375.75 = 375.75/x
  3. Step 3: Cross multiply
    345x = 375.75 × 375.75
  4. Step 4: Simplify right side
    345x = 141,188.06
  5. Step 5: Solve for x
    x = 141,188.06/345
  6. Step 6: Final answer
    x = 409.24

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Why These Related Problems?

These problems maintain the same ratio (1.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.