Home / 811,290.70-1,216,936.05-512,109.10

Finding the Fourth Proportional to 811,290.70, 1,216,936.05 and 512,109.10

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Solution

The fourth proportional to 811,290.70, 1,216,936.05 and 512,109.10 is: 768,163.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,290.70 : 1,216,936.05 = 512,109.10 : x
  2. Step 2: Convert to fraction form
    811,290.70/1,216,936.05 = 512,109.10/x
  3. Step 3: Cross multiply
    811,290.70x = 1,216,936.05 × 512,109.10
  4. Step 4: Simplify right side
    811,290.70x = 623,204,025,323.06
  5. Step 5: Solve for x
    x = 623,204,025,323.06/811,290.70
  6. Step 6: Final answer
    x = 768,163.65

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Double scale
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Similar ratio
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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.