Home / 811,238.40-1,216,857.60-212,198.40

Finding the Fourth Proportional to 811,238.40, 1,216,857.60 and 212,198.40

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Solution

The fourth proportional to 811,238.40, 1,216,857.60 and 212,198.40 is: 318,297.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,238.40 : 1,216,857.60 = 212,198.40 : x
  2. Step 2: Convert to fraction form
    811,238.40/1,216,857.60 = 212,198.40/x
  3. Step 3: Cross multiply
    811,238.40x = 1,216,857.60 × 212,198.40
  4. Step 4: Simplify right side
    811,238.40x = 258,215,235,747.84
  5. Step 5: Solve for x
    x = 258,215,235,747.84/811,238.40
  6. Step 6: Final answer
    x = 318,297.60

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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.