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Finding the Third Proportional to 391,542.75 and 520,609.50

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Solution

The third proportional to 391,542.75 and 520,609.50 is: 692,221.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,542.75 : 520,609.50 = 520,609.50 : x
  2. Step 2: Convert to fraction form
    391,542.75/520,609.50 = 520,609.50/x
  3. Step 3: Cross multiply
    391,542.75x = 520,609.50 × 520,609.50
  4. Step 4: Simplify right side
    391,542.75x = 271,034,251,490.25
  5. Step 5: Solve for x
    x = 271,034,251,490.25/391,542.75
  6. Step 6: Final answer
    x = 692,221.35

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.