Home / 1,211,138.91-1,816,989.78-412,427.37

Finding the Fourth Proportional to 1,211,138.91, 1,816,989.78 and 412,427.37

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Solution

The fourth proportional to 1,211,138.91, 1,816,989.78 and 412,427.37 is: 618,736.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211,138.91 : 1,816,989.78 = 412,427.37 : x
  2. Step 2: Convert to fraction form
    1,211,138.91/1,816,989.78 = 412,427.37/x
  3. Step 3: Cross multiply
    1,211,138.91x = 1,816,989.78 × 412,427.37
  4. Step 4: Simplify right side
    1,211,138.91x = 749,376,316,282.28
  5. Step 5: Solve for x
    x = 749,376,316,282.28/1,211,138.91
  6. Step 6: Final answer
    x = 618,736.88

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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.