Home / 1,438.14-2,158.17-789.33

Finding the Fourth Proportional to 1,438.14, 2,158.17 and 789.33

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Solution

The fourth proportional to 1,438.14, 2,158.17 and 789.33 is: 1,184.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,438.14 : 2,158.17 = 789.33 : x
  2. Step 2: Convert to fraction form
    1,438.14/2,158.17 = 789.33/x
  3. Step 3: Cross multiply
    1,438.14x = 2,158.17 × 789.33
  4. Step 4: Simplify right side
    1,438.14x = 1,703,508.33
  5. Step 5: Solve for x
    x = 1,703,508.33/1,438.14
  6. Step 6: Final answer
    x = 1,184.52

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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.