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Finding the Third Proportional to 393,921 and 611,115

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Solution

The third proportional to 393,921 and 611,115 is: 948,062.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,921 : 611,115 = 611,115 : x
  2. Step 2: Convert to fraction form
    393,921/611,115 = 611,115/x
  3. Step 3: Cross multiply
    393,921x = 611,115 × 611,115
  4. Step 4: Simplify right side
    393,921x = 373,461,543,225
  5. Step 5: Solve for x
    x = 373,461,543,225/393,921
  6. Step 6: Final answer
    x = 948,062.03

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.