Home / 1,231.32-1,689.18-1,200.36

Finding the Fourth Proportional to 1,231.32, 1,689.18 and 1,200.36

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Solution

The fourth proportional to 1,231.32, 1,689.18 and 1,200.36 is: 1,646.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,231.32 : 1,689.18 = 1,200.36 : x
  2. Step 2: Convert to fraction form
    1,231.32/1,689.18 = 1,200.36/x
  3. Step 3: Cross multiply
    1,231.32x = 1,689.18 × 1,200.36
  4. Step 4: Simplify right side
    1,231.32x = 2,027,624.10
  5. Step 5: Solve for x
    x = 2,027,624.10/1,231.32
  6. Step 6: Final answer
    x = 1,646.71

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.