Home / 811,780.88-1,120,034.22-505,906.88

Finding the Fourth Proportional to 811,780.88, 1,120,034.22 and 505,906.88

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Solution

The fourth proportional to 811,780.88, 1,120,034.22 and 505,906.88 is: 698,012.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,780.88 : 1,120,034.22 = 505,906.88 : x
  2. Step 2: Convert to fraction form
    811,780.88/1,120,034.22 = 505,906.88/x
  3. Step 3: Cross multiply
    811,780.88x = 1,120,034.22 × 505,906.88
  4. Step 4: Simplify right side
    811,780.88x = 566,633,017,733.43
  5. Step 5: Solve for x
    x = 566,633,017,733.43/811,780.88
  6. Step 6: Final answer
    x = 698,012.27

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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.