Home / 1,338.11-2,007.20-635.15

Finding the Fourth Proportional to 1,338.11, 2,007.20 and 635.15

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Solution

The fourth proportional to 1,338.11, 2,007.20 and 635.15 is: 952.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,338.11 : 2,007.20 = 635.15 : x
  2. Step 2: Convert to fraction form
    1,338.11/2,007.20 = 635.15/x
  3. Step 3: Cross multiply
    1,338.11x = 2,007.20 × 635.15
  4. Step 4: Simplify right side
    1,338.11x = 1,274,873.08
  5. Step 5: Solve for x
    x = 1,274,873.08/1,338.11
  6. Step 6: Final answer
    x = 952.74

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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.