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Finding the Third Proportional to 389,418.75 and 839,101.50

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Solution

The third proportional to 389,418.75 and 839,101.50 is: 1,808,057.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,418.75 : 839,101.50 = 839,101.50 : x
  2. Step 2: Convert to fraction form
    389,418.75/839,101.50 = 839,101.50/x
  3. Step 3: Cross multiply
    389,418.75x = 839,101.50 × 839,101.50
  4. Step 4: Simplify right side
    389,418.75x = 704,091,327,302.25
  5. Step 5: Solve for x
    x = 704,091,327,302.25/389,418.75
  6. Step 6: Final answer
    x = 1,808,057.08

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.