Home / 1,231.19-1,846.78-1,200.21

Finding the Fourth Proportional to 1,231.19, 1,846.78 and 1,200.21

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Solution

The fourth proportional to 1,231.19, 1,846.78 and 1,200.21 is: 1,800.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,231.19 : 1,846.78 = 1,200.21 : x
  2. Step 2: Convert to fraction form
    1,231.19/1,846.78 = 1,200.21/x
  3. Step 3: Cross multiply
    1,231.19x = 1,846.78 × 1,200.21
  4. Step 4: Simplify right side
    1,231.19x = 2,216,523.82
  5. Step 5: Solve for x
    x = 2,216,523.82/1,231.19
  6. Step 6: Final answer
    x = 1,800.31

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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.