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Finding the Fourth Proportional to 479,115.76, 661,209.96 and 275,230.48

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Solution

The fourth proportional to 479,115.76, 661,209.96 and 275,230.48 is: 379,835.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,115.76 : 661,209.96 = 275,230.48 : x
  2. Step 2: Convert to fraction form
    479,115.76/661,209.96 = 275,230.48/x
  3. Step 3: Cross multiply
    479,115.76x = 661,209.96 × 275,230.48
  4. Step 4: Simplify right side
    479,115.76x = 181,985,134,671.58
  5. Step 5: Solve for x
    x = 181,985,134,671.58/479,115.76
  6. Step 6: Final answer
    x = 379,835.42

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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.