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Finding the Third Proportional to 639,442.50 and 1,399,239

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Solution

The third proportional to 639,442.50 and 1,399,239 is: 3,061,838.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,442.50 : 1,399,239 = 1,399,239 : x
  2. Step 2: Convert to fraction form
    639,442.50/1,399,239 = 1,399,239/x
  3. Step 3: Cross multiply
    639,442.50x = 1,399,239 × 1,399,239
  4. Step 4: Simplify right side
    639,442.50x = 1,957,869,779,121
  5. Step 5: Solve for x
    x = 1,957,869,779,121/639,442.50
  6. Step 6: Final answer
    x = 3,061,838.68

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.