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Finding the Third Proportional to 146.50 and 317.75

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Solution

The third proportional to 146.50 and 317.75 is: 689.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    146.50 : 317.75 = 317.75 : x
  2. Step 2: Convert to fraction form
    146.50/317.75 = 317.75/x
  3. Step 3: Cross multiply
    146.50x = 317.75 × 317.75
  4. Step 4: Simplify right side
    146.50x = 100,965.06
  5. Step 5: Solve for x
    x = 100,965.06/146.50
  6. Step 6: Final answer
    x = 689.18

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.