Home / 485,736.90-727,621.20-275,128.80

Finding the Fourth Proportional to 485,736.90, 727,621.20 and 275,128.80

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Solution

The fourth proportional to 485,736.90, 727,621.20 and 275,128.80 is: 412,135.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,736.90 : 727,621.20 = 275,128.80 : x
  2. Step 2: Convert to fraction form
    485,736.90/727,621.20 = 275,128.80/x
  3. Step 3: Cross multiply
    485,736.90x = 727,621.20 × 275,128.80
  4. Step 4: Simplify right side
    485,736.90x = 200,189,547,610.56
  5. Step 5: Solve for x
    x = 200,189,547,610.56/485,736.90
  6. Step 6: Final answer
    x = 412,135.76

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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.