Home / 827,137.85-1,240,917.25-485,869.86

Finding the Fourth Proportional to 827,137.85, 1,240,917.25 and 485,869.86

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Solution

The fourth proportional to 827,137.85, 1,240,917.25 and 485,869.86 is: 728,928.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    827,137.85 : 1,240,917.25 = 485,869.86 : x
  2. Step 2: Convert to fraction form
    827,137.85/1,240,917.25 = 485,869.86/x
  3. Step 3: Cross multiply
    827,137.85x = 1,240,917.25 × 485,869.86
  4. Step 4: Simplify right side
    827,137.85x = 602,924,290,529.09
  5. Step 5: Solve for x
    x = 602,924,290,529.09/827,137.85
  6. Step 6: Final answer
    x = 728,928.43

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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.