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Finding the Third Proportional to 638,729.50 and 1,390,859

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Solution

The third proportional to 638,729.50 and 1,390,859 is: 3,028,651.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,729.50 : 1,390,859 = 1,390,859 : x
  2. Step 2: Convert to fraction form
    638,729.50/1,390,859 = 1,390,859/x
  3. Step 3: Cross multiply
    638,729.50x = 1,390,859 × 1,390,859
  4. Step 4: Simplify right side
    638,729.50x = 1,934,488,757,881
  5. Step 5: Solve for x
    x = 1,934,488,757,881/638,729.50
  6. Step 6: Final answer
    x = 3,028,651.03

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.