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Finding the Third Proportional to 395,390 and 847,987

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Solution

The third proportional to 395,390 and 847,987 is: 1,818,664.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,390 : 847,987 = 847,987 : x
  2. Step 2: Convert to fraction form
    395,390/847,987 = 847,987/x
  3. Step 3: Cross multiply
    395,390x = 847,987 × 847,987
  4. Step 4: Simplify right side
    395,390x = 719,081,952,169
  5. Step 5: Solve for x
    x = 719,081,952,169/395,390
  6. Step 6: Final answer
    x = 1,818,664.99

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.