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Finding the Third Proportional to 312.50 and 359

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Solution

The third proportional to 312.50 and 359 is: 412.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    312.50 : 359 = 359 : x
  2. Step 2: Convert to fraction form
    312.50/359 = 359/x
  3. Step 3: Cross multiply
    312.50x = 359 × 359
  4. Step 4: Simplify right side
    312.50x = 128,881
  5. Step 5: Solve for x
    x = 128,881/312.50
  6. Step 6: Final answer
    x = 412.42

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These problems maintain the same ratio (1.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.