Home / 1,415.20-2,122.19-441.38

Finding the Fourth Proportional to 1,415.20, 2,122.19 and 441.38

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Solution

The fourth proportional to 1,415.20, 2,122.19 and 441.38 is: 661.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,415.20 : 2,122.19 = 441.38 : x
  2. Step 2: Convert to fraction form
    1,415.20/2,122.19 = 441.38/x
  3. Step 3: Cross multiply
    1,415.20x = 2,122.19 × 441.38
  4. Step 4: Simplify right side
    1,415.20x = 936,692.22
  5. Step 5: Solve for x
    x = 936,692.22/1,415.20
  6. Step 6: Final answer
    x = 661.88

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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.