Home / 811,909.20-1,217,863.80-338,437.20

Finding the Fourth Proportional to 811,909.20, 1,217,863.80 and 338,437.20

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Solution

The fourth proportional to 811,909.20, 1,217,863.80 and 338,437.20 is: 507,655.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,909.20 : 1,217,863.80 = 338,437.20 : x
  2. Step 2: Convert to fraction form
    811,909.20/1,217,863.80 = 338,437.20/x
  3. Step 3: Cross multiply
    811,909.20x = 1,217,863.80 × 338,437.20
  4. Step 4: Simplify right side
    811,909.20x = 412,170,414,453.36
  5. Step 5: Solve for x
    x = 412,170,414,453.36/811,909.20
  6. Step 6: Final answer
    x = 507,655.80

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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.