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Finding the Third Proportional to 512.26 and 783.90

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Solution

The third proportional to 512.26 and 783.90 is: 1,199.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    512.26 : 783.90 = 783.90 : x
  2. Step 2: Convert to fraction form
    512.26/783.90 = 783.90/x
  3. Step 3: Cross multiply
    512.26x = 783.90 × 783.90
  4. Step 4: Simplify right side
    512.26x = 614,493.70
  5. Step 5: Solve for x
    x = 614,493.70/512.26
  6. Step 6: Final answer
    x = 1,199.57

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.