Home / 811,614.39-1,120,386.59-485,042.61

Finding the Fourth Proportional to 811,614.39, 1,120,386.59 and 485,042.61

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Solution

The fourth proportional to 811,614.39, 1,120,386.59 and 485,042.61 is: 669,573.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,614.39 : 1,120,386.59 = 485,042.61 : x
  2. Step 2: Convert to fraction form
    811,614.39/1,120,386.59 = 485,042.61/x
  3. Step 3: Cross multiply
    811,614.39x = 1,120,386.59 × 485,042.61
  4. Step 4: Simplify right side
    811,614.39x = 543,435,233,397.39
  5. Step 5: Solve for x
    x = 543,435,233,397.39/811,614.39
  6. Step 6: Final answer
    x = 669,573.19

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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.