Home / 1,690.81-2,536.22-1,231.52

Finding the Fourth Proportional to 1,690.81, 2,536.22 and 1,231.52

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Solution

The fourth proportional to 1,690.81, 2,536.22 and 1,231.52 is: 1,847.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,690.81 : 2,536.22 = 1,231.52 : x
  2. Step 2: Convert to fraction form
    1,690.81/2,536.22 = 1,231.52/x
  3. Step 3: Cross multiply
    1,690.81x = 2,536.22 × 1,231.52
  4. Step 4: Simplify right side
    1,690.81x = 3,123,405.65
  5. Step 5: Solve for x
    x = 3,123,405.65/1,690.81
  6. Step 6: Final answer
    x = 1,847.28

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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.