Home / 812,405.62-1,121,106.18-449,821.54

Finding the Fourth Proportional to 812,405.62, 1,121,106.18 and 449,821.54

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Solution

The fourth proportional to 812,405.62, 1,121,106.18 and 449,821.54 is: 620,746.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,405.62 : 1,121,106.18 = 449,821.54 : x
  2. Step 2: Convert to fraction form
    812,405.62/1,121,106.18 = 449,821.54/x
  3. Step 3: Cross multiply
    812,405.62x = 1,121,106.18 × 449,821.54
  4. Step 4: Simplify right side
    812,405.62x = 504,297,708,391.12
  5. Step 5: Solve for x
    x = 504,297,708,391.12/812,405.62
  6. Step 6: Final answer
    x = 620,746.21

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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.