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Finding the Third Proportional to 571.25 and 855.50

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Solution

The third proportional to 571.25 and 855.50 is: 1,281.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.25 : 855.50 = 855.50 : x
  2. Step 2: Convert to fraction form
    571.25/855.50 = 855.50/x
  3. Step 3: Cross multiply
    571.25x = 855.50 × 855.50
  4. Step 4: Simplify right side
    571.25x = 731,880.25
  5. Step 5: Solve for x
    x = 731,880.25/571.25
  6. Step 6: Final answer
    x = 1,281.19

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.