Home / 2,145.88-3,211.80-1,324.81

Finding the Fourth Proportional to 2,145.88, 3,211.80 and 1,324.81

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Solution

The fourth proportional to 2,145.88, 3,211.80 and 1,324.81 is: 1,982.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,145.88 : 3,211.80 = 1,324.81 : x
  2. Step 2: Convert to fraction form
    2,145.88/3,211.80 = 1,324.81/x
  3. Step 3: Cross multiply
    2,145.88x = 3,211.80 × 1,324.81
  4. Step 4: Simplify right side
    2,145.88x = 4,255,024.76
  5. Step 5: Solve for x
    x = 4,255,024.76/2,145.88
  6. Step 6: Final answer
    x = 1,982.88

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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.