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Finding the Third Proportional to 615.50 and 853.75

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Solution

The third proportional to 615.50 and 853.75 is: 1,184.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.50 : 853.75 = 853.75 : x
  2. Step 2: Convert to fraction form
    615.50/853.75 = 853.75/x
  3. Step 3: Cross multiply
    615.50x = 853.75 × 853.75
  4. Step 4: Simplify right side
    615.50x = 728,889.06
  5. Step 5: Solve for x
    x = 728,889.06/615.50
  6. Step 6: Final answer
    x = 1,184.22

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.