Home / 853,872.80-1,280,809.20-262,896.80

Finding the Fourth Proportional to 853,872.80, 1,280,809.20 and 262,896.80

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Solution

The fourth proportional to 853,872.80, 1,280,809.20 and 262,896.80 is: 394,345.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    853,872.80 : 1,280,809.20 = 262,896.80 : x
  2. Step 2: Convert to fraction form
    853,872.80/1,280,809.20 = 262,896.80/x
  3. Step 3: Cross multiply
    853,872.80x = 1,280,809.20 × 262,896.80
  4. Step 4: Simplify right side
    853,872.80x = 336,720,640,090.56
  5. Step 5: Solve for x
    x = 336,720,640,090.56/853,872.80
  6. Step 6: Final answer
    x = 394,345.20

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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.