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Finding the Third Proportional to 545.48 and 891.42

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Solution

The third proportional to 545.48 and 891.42 is: 1,456.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    545.48 : 891.42 = 891.42 : x
  2. Step 2: Convert to fraction form
    545.48/891.42 = 891.42/x
  3. Step 3: Cross multiply
    545.48x = 891.42 × 891.42
  4. Step 4: Simplify right side
    545.48x = 794,632.96
  5. Step 5: Solve for x
    x = 794,632.96/545.48
  6. Step 6: Final answer
    x = 1,456.75

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Why These Related Problems?

These problems maintain the same ratio (1.63) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.