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Finding the Third Proportional to 322.50 and 468.75

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Solution

The third proportional to 322.50 and 468.75 is: 681.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.50 : 468.75 = 468.75 : x
  2. Step 2: Convert to fraction form
    322.50/468.75 = 468.75/x
  3. Step 3: Cross multiply
    322.50x = 468.75 × 468.75
  4. Step 4: Simplify right side
    322.50x = 219,726.56
  5. Step 5: Solve for x
    x = 219,726.56/322.50
  6. Step 6: Final answer
    x = 681.32

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Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.