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Finding the Third Proportional to 218,740.50 and 342,690.75

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Solution

The third proportional to 218,740.50 and 342,690.75 is: 536,877.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,740.50 : 342,690.75 = 342,690.75 : x
  2. Step 2: Convert to fraction form
    218,740.50/342,690.75 = 342,690.75/x
  3. Step 3: Cross multiply
    218,740.50x = 342,690.75 × 342,690.75
  4. Step 4: Simplify right side
    218,740.50x = 117,436,950,135.56
  5. Step 5: Solve for x
    x = 117,436,950,135.56/218,740.50
  6. Step 6: Final answer
    x = 536,877.95

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.