Home / 811,616.39-1,120,389.35-485,044.61

Finding the Fourth Proportional to 811,616.39, 1,120,389.35 and 485,044.61

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Solution

The fourth proportional to 811,616.39, 1,120,389.35 and 485,044.61 is: 669,575.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,616.39 : 1,120,389.35 = 485,044.61 : x
  2. Step 2: Convert to fraction form
    811,616.39/1,120,389.35 = 485,044.61/x
  3. Step 3: Cross multiply
    811,616.39x = 1,120,389.35 × 485,044.61
  4. Step 4: Simplify right side
    811,616.39x = 543,438,815,318.90
  5. Step 5: Solve for x
    x = 543,438,815,318.90/811,616.39
  6. Step 6: Final answer
    x = 669,575.95

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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.