Home / 812,205.12-1,120,829.64-449,621.52

Finding the Fourth Proportional to 812,205.12, 1,120,829.64 and 449,621.52

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Solution

The fourth proportional to 812,205.12, 1,120,829.64 and 449,621.52 is: 620,470.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,205.12 : 1,120,829.64 = 449,621.52 : x
  2. Step 2: Convert to fraction form
    812,205.12/1,120,829.64 = 449,621.52/x
  3. Step 3: Cross multiply
    812,205.12x = 1,120,829.64 × 449,621.52
  4. Step 4: Simplify right side
    812,205.12x = 503,949,126,397.85
  5. Step 5: Solve for x
    x = 503,949,126,397.85/812,205.12
  6. Step 6: Final answer
    x = 620,470.27

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1.5x scale

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.