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Finding the Fourth Proportional to 279,586.40, 419,029.86 and 220,187.48

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Solution

The fourth proportional to 279,586.40, 419,029.86 and 220,187.48 is: 330,005.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,586.40 : 419,029.86 = 220,187.48 : x
  2. Step 2: Convert to fraction form
    279,586.40/419,029.86 = 220,187.48/x
  3. Step 3: Cross multiply
    279,586.40x = 419,029.86 × 220,187.48
  4. Step 4: Simplify right side
    279,586.40x = 92,265,128,918.15
  5. Step 5: Solve for x
    x = 92,265,128,918.15/279,586.40
  6. Step 6: Final answer
    x = 330,005.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.