Home / 1,521.38-2,109.07-1,438.22

Finding the Fourth Proportional to 1,521.38, 2,109.07 and 1,438.22

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Solution

The fourth proportional to 1,521.38, 2,109.07 and 1,438.22 is: 1,993.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,521.38 : 2,109.07 = 1,438.22 : x
  2. Step 2: Convert to fraction form
    1,521.38/2,109.07 = 1,438.22/x
  3. Step 3: Cross multiply
    1,521.38x = 2,109.07 × 1,438.22
  4. Step 4: Simplify right side
    1,521.38x = 3,033,313.73
  5. Step 5: Solve for x
    x = 3,033,313.73/1,521.38
  6. Step 6: Final answer
    x = 1,993.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.