Home / 861,089.40-1,291,634.10-261,997.20

Finding the Fourth Proportional to 861,089.40, 1,291,634.10 and 261,997.20

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Solution

The fourth proportional to 861,089.40, 1,291,634.10 and 261,997.20 is: 392,995.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,089.40 : 1,291,634.10 = 261,997.20 : x
  2. Step 2: Convert to fraction form
    861,089.40/1,291,634.10 = 261,997.20/x
  3. Step 3: Cross multiply
    861,089.40x = 1,291,634.10 × 261,997.20
  4. Step 4: Simplify right side
    861,089.40x = 338,404,517,624.52
  5. Step 5: Solve for x
    x = 338,404,517,624.52/861,089.40
  6. Step 6: Final answer
    x = 392,995.80

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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.