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Finding the Third Proportional to 545.25 and 830.75

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Solution

The third proportional to 545.25 and 830.75 is: 1,265.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.25 : 830.75 = 830.75 : x
  2. Step 2: Convert to fraction form
    545.25/830.75 = 830.75/x
  3. Step 3: Cross multiply
    545.25x = 830.75 × 830.75
  4. Step 4: Simplify right side
    545.25x = 690,145.56
  5. Step 5: Solve for x
    x = 690,145.56/545.25
  6. Step 6: Final answer
    x = 1,265.74

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.