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Finding the Third Proportional to 421,939.50 and 563,640

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Solution

The third proportional to 421,939.50 and 563,640 is: 752,927.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,939.50 : 563,640 = 563,640 : x
  2. Step 2: Convert to fraction form
    421,939.50/563,640 = 563,640/x
  3. Step 3: Cross multiply
    421,939.50x = 563,640 × 563,640
  4. Step 4: Simplify right side
    421,939.50x = 317,690,049,600
  5. Step 5: Solve for x
    x = 317,690,049,600/421,939.50
  6. Step 6: Final answer
    x = 752,927.97

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Why These Related Problems?

These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.