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Finding the Fourth Proportional to 892,399.60, 1,230,470.94 and 665,651.44

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Solution

The fourth proportional to 892,399.60, 1,230,470.94 and 665,651.44 is: 917,822.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    892,399.60 : 1,230,470.94 = 665,651.44 : x
  2. Step 2: Convert to fraction form
    892,399.60/1,230,470.94 = 665,651.44/x
  3. Step 3: Cross multiply
    892,399.60x = 1,230,470.94 × 665,651.44
  4. Step 4: Simplify right side
    892,399.60x = 819,064,753,089.15
  5. Step 5: Solve for x
    x = 819,064,753,089.15/892,399.60
  6. Step 6: Final answer
    x = 917,822.86

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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.