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Finding the Third Proportional to 375.50 and 491.75

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Solution

The third proportional to 375.50 and 491.75 is: 643.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    375.50 : 491.75 = 491.75 : x
  2. Step 2: Convert to fraction form
    375.50/491.75 = 491.75/x
  3. Step 3: Cross multiply
    375.50x = 491.75 × 491.75
  4. Step 4: Simplify right side
    375.50x = 241,818.06
  5. Step 5: Solve for x
    x = 241,818.06/375.50
  6. Step 6: Final answer
    x = 643.99

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Why These Related Problems?

These problems maintain the same ratio (1.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.