Home / 1,489.32-2,231.64-1,123.83

Finding the Fourth Proportional to 1,489.32, 2,231.64 and 1,123.83

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Solution

The fourth proportional to 1,489.32, 2,231.64 and 1,123.83 is: 1,683.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,489.32 : 2,231.64 = 1,123.83 : x
  2. Step 2: Convert to fraction form
    1,489.32/2,231.64 = 1,123.83/x
  3. Step 3: Cross multiply
    1,489.32x = 2,231.64 × 1,123.83
  4. Step 4: Simplify right side
    1,489.32x = 2,507,983.98
  5. Step 5: Solve for x
    x = 2,507,983.98/1,489.32
  6. Step 6: Final answer
    x = 1,683.98

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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.