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Finding the Fourth Proportional to 2,143.88, 3,210.96 and 1,049.12

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Solution

The fourth proportional to 2,143.88, 3,210.96 and 1,049.12 is: 1,571.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,143.88 : 3,210.96 = 1,049.12 : x
  2. Step 2: Convert to fraction form
    2,143.88/3,210.96 = 1,049.12/x
  3. Step 3: Cross multiply
    2,143.88x = 3,210.96 × 1,049.12
  4. Step 4: Simplify right side
    2,143.88x = 3,368,682.36
  5. Step 5: Solve for x
    x = 3,368,682.36/2,143.88
  6. Step 6: Final answer
    x = 1,571.30

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1.5x scale

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.