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Finding the Third Proportional to 317 and 519.50

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Solution

The third proportional to 317 and 519.50 is: 851.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    317 : 519.50 = 519.50 : x
  2. Step 2: Convert to fraction form
    317/519.50 = 519.50/x
  3. Step 3: Cross multiply
    317x = 519.50 × 519.50
  4. Step 4: Simplify right side
    317x = 269,880.25
  5. Step 5: Solve for x
    x = 269,880.25/317
  6. Step 6: Final answer
    x = 851.36

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Why These Related Problems?

These problems maintain the same ratio (1.64) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.