Home / 811,850.88-1,120,356.39-449,299.74

Finding the Fourth Proportional to 811,850.88, 1,120,356.39 and 449,299.74

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Solution

The fourth proportional to 811,850.88, 1,120,356.39 and 449,299.74 is: 620,034.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,850.88 : 1,120,356.39 = 449,299.74 : x
  2. Step 2: Convert to fraction form
    811,850.88/1,120,356.39 = 449,299.74/x
  3. Step 3: Cross multiply
    811,850.88x = 1,120,356.39 × 449,299.74
  4. Step 4: Simplify right side
    811,850.88x = 503,375,834,734.34
  5. Step 5: Solve for x
    x = 503,375,834,734.34/811,850.88
  6. Step 6: Final answer
    x = 620,034.85

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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.