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Finding the Third Proportional to 551 and 810.25

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Solution

The third proportional to 551 and 810.25 is: 1,191.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    551 : 810.25 = 810.25 : x
  2. Step 2: Convert to fraction form
    551/810.25 = 810.25/x
  3. Step 3: Cross multiply
    551x = 810.25 × 810.25
  4. Step 4: Simplify right side
    551x = 656,505.06
  5. Step 5: Solve for x
    x = 656,505.06/551
  6. Step 6: Final answer
    x = 1,191.48

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.