Home / 2,143.80-2,958.30-1,212.12

Finding the Fourth Proportional to 2,143.80, 2,958.30 and 1,212.12

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Solution

The fourth proportional to 2,143.80, 2,958.30 and 1,212.12 is: 1,672.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,143.80 : 2,958.30 = 1,212.12 : x
  2. Step 2: Convert to fraction form
    2,143.80/2,958.30 = 1,212.12/x
  3. Step 3: Cross multiply
    2,143.80x = 2,958.30 × 1,212.12
  4. Step 4: Simplify right side
    2,143.80x = 3,585,814.60
  5. Step 5: Solve for x
    x = 3,585,814.60/2,143.80
  6. Step 6: Final answer
    x = 1,672.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.