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Finding the Fourth Proportional to 892,398.60, 1,230,469.56 and 665,650.44

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Solution

The fourth proportional to 892,398.60, 1,230,469.56 and 665,650.44 is: 917,821.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    892,398.60 : 1,230,469.56 = 665,650.44 : x
  2. Step 2: Convert to fraction form
    892,398.60/1,230,469.56 = 665,650.44/x
  3. Step 3: Cross multiply
    892,398.60x = 1,230,469.56 × 665,650.44
  4. Step 4: Simplify right side
    892,398.60x = 819,062,604,020.61
  5. Step 5: Solve for x
    x = 819,062,604,020.61/892,398.60
  6. Step 6: Final answer
    x = 917,821.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.