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Finding the Third Proportional to 711.25 and 1,487.75

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Solution

The third proportional to 711.25 and 1,487.75 is: 3,111.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    711.25 : 1,487.75 = 1,487.75 : x
  2. Step 2: Convert to fraction form
    711.25/1,487.75 = 1,487.75/x
  3. Step 3: Cross multiply
    711.25x = 1,487.75 × 1,487.75
  4. Step 4: Simplify right side
    711.25x = 2,213,400.06
  5. Step 5: Solve for x
    x = 2,213,400.06/711.25
  6. Step 6: Final answer
    x = 3,111.99

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Why These Related Problems?

These problems maintain the same ratio (2.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.