Home / 1,212,838.20-1,819,257.30-1,189,218.60

Finding the Fourth Proportional to 1,212,838.20, 1,819,257.30 and 1,189,218.60

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Solution

The fourth proportional to 1,212,838.20, 1,819,257.30 and 1,189,218.60 is: 1,783,827.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,212,838.20 : 1,819,257.30 = 1,189,218.60 : x
  2. Step 2: Convert to fraction form
    1,212,838.20/1,819,257.30 = 1,189,218.60/x
  3. Step 3: Cross multiply
    1,212,838.20x = 1,819,257.30 × 1,189,218.60
  4. Step 4: Simplify right side
    1,212,838.20x = 2,163,494,619,345.78
  5. Step 5: Solve for x
    x = 2,163,494,619,345.78/1,212,838.20
  6. Step 6: Final answer
    x = 1,783,827.90

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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.