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Finding the Fourth Proportional to 827,351.40, 1,240,879.14 and 220,143

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Solution

The fourth proportional to 827,351.40, 1,240,879.14 and 220,143 is: 330,175.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    827,351.40 : 1,240,879.14 = 220,143 : x
  2. Step 2: Convert to fraction form
    827,351.40/1,240,879.14 = 220,143/x
  3. Step 3: Cross multiply
    827,351.40x = 1,240,879.14 × 220,143
  4. Step 4: Simplify right side
    827,351.40x = 273,170,856,517.02
  5. Step 5: Solve for x
    x = 273,170,856,517.02/827,351.40
  6. Step 6: Final answer
    x = 330,175.13

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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.