Home / 811,408.80-1,217,113.20-412,111.20

Finding the Fourth Proportional to 811,408.80, 1,217,113.20 and 412,111.20

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Solution

The fourth proportional to 811,408.80, 1,217,113.20 and 412,111.20 is: 618,166.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,408.80 : 1,217,113.20 = 412,111.20 : x
  2. Step 2: Convert to fraction form
    811,408.80/1,217,113.20 = 412,111.20/x
  3. Step 3: Cross multiply
    811,408.80x = 1,217,113.20 × 412,111.20
  4. Step 4: Simplify right side
    811,408.80x = 501,585,981,387.84
  5. Step 5: Solve for x
    x = 501,585,981,387.84/811,408.80
  6. Step 6: Final answer
    x = 618,166.80

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.