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Finding the Third Proportional to 385,644 and 790,080

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Solution

The third proportional to 385,644 and 790,080 is: 1,618,659.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,644 : 790,080 = 790,080 : x
  2. Step 2: Convert to fraction form
    385,644/790,080 = 790,080/x
  3. Step 3: Cross multiply
    385,644x = 790,080 × 790,080
  4. Step 4: Simplify right side
    385,644x = 624,226,406,400
  5. Step 5: Solve for x
    x = 624,226,406,400/385,644
  6. Step 6: Final answer
    x = 1,618,659.71

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Why These Related Problems?

These problems maintain the same ratio (2.05) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.