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Finding the Third Proportional to 619.75 and 959.38

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Solution

The third proportional to 619.75 and 959.38 is: 1,485.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.75 : 959.38 = 959.38 : x
  2. Step 2: Convert to fraction form
    619.75/959.38 = 959.38/x
  3. Step 3: Cross multiply
    619.75x = 959.38 × 959.38
  4. Step 4: Simplify right side
    619.75x = 920,400.39
  5. Step 5: Solve for x
    x = 920,400.39/619.75
  6. Step 6: Final answer
    x = 1,485.12

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.