Home / 2,121.51-3,183.38-1,509.15

Finding the Fourth Proportional to 2,121.51, 3,183.38 and 1,509.15

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Solution

The fourth proportional to 2,121.51, 3,183.38 and 1,509.15 is: 2,264.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.51 : 3,183.38 = 1,509.15 : x
  2. Step 2: Convert to fraction form
    2,121.51/3,183.38 = 1,509.15/x
  3. Step 3: Cross multiply
    2,121.51x = 3,183.38 × 1,509.15
  4. Step 4: Simplify right side
    2,121.51x = 4,804,190.38
  5. Step 5: Solve for x
    x = 4,804,190.38/2,121.51
  6. Step 6: Final answer
    x = 2,264.51

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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.