Home / 1,415.03-2,121.18-789.38

Finding the Fourth Proportional to 1,415.03, 2,121.18 and 789.38

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Solution

The fourth proportional to 1,415.03, 2,121.18 and 789.38 is: 1,183.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,415.03 : 2,121.18 = 789.38 : x
  2. Step 2: Convert to fraction form
    1,415.03/2,121.18 = 789.38/x
  3. Step 3: Cross multiply
    1,415.03x = 2,121.18 × 789.38
  4. Step 4: Simplify right side
    1,415.03x = 1,674,406.46
  5. Step 5: Solve for x
    x = 1,674,406.46/1,415.03
  6. Step 6: Final answer
    x = 1,183.31

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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.