Home / 812,064.24-1,120,639.20-449,488.80

Finding the Fourth Proportional to 812,064.24, 1,120,639.20 and 449,488.80

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Solution

The fourth proportional to 812,064.24, 1,120,639.20 and 449,488.80 is: 620,289.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,064.24 : 1,120,639.20 = 449,488.80 : x
  2. Step 2: Convert to fraction form
    812,064.24/1,120,639.20 = 449,488.80/x
  3. Step 3: Cross multiply
    812,064.24x = 1,120,639.20 × 449,488.80
  4. Step 4: Simplify right side
    812,064.24x = 503,714,769,240.96
  5. Step 5: Solve for x
    x = 503,714,769,240.96/812,064.24
  6. Step 6: Final answer
    x = 620,289.31

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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.