Home / 812,921.92-1,121,872.48-490,626.88

Finding the Fourth Proportional to 812,921.92, 1,121,872.48 and 490,626.88

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Solution

The fourth proportional to 812,921.92, 1,121,872.48 and 490,626.88 is: 677,089.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,921.92 : 1,121,872.48 = 490,626.88 : x
  2. Step 2: Convert to fraction form
    812,921.92/1,121,872.48 = 490,626.88/x
  3. Step 3: Cross multiply
    812,921.92x = 1,121,872.48 × 490,626.88
  4. Step 4: Simplify right side
    812,921.92x = 550,420,794,620.26
  5. Step 5: Solve for x
    x = 550,420,794,620.26/812,921.92
  6. Step 6: Final answer
    x = 677,089.37

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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.