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Finding the Third Proportional to 811.75 and 1,227.50

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Solution

The third proportional to 811.75 and 1,227.50 is: 1,856.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    811.75 : 1,227.50 = 1,227.50 : x
  2. Step 2: Convert to fraction form
    811.75/1,227.50 = 1,227.50/x
  3. Step 3: Cross multiply
    811.75x = 1,227.50 × 1,227.50
  4. Step 4: Simplify right side
    811.75x = 1,506,756.25
  5. Step 5: Solve for x
    x = 1,506,756.25/811.75
  6. Step 6: Final answer
    x = 1,856.18

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.