Home / 2,140.91-3,211.76-754.09

Finding the Fourth Proportional to 2,140.91, 3,211.76 and 754.09

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Solution

The fourth proportional to 2,140.91, 3,211.76 and 754.09 is: 1,131.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,140.91 : 3,211.76 = 754.09 : x
  2. Step 2: Convert to fraction form
    2,140.91/3,211.76 = 754.09/x
  3. Step 3: Cross multiply
    2,140.91x = 3,211.76 × 754.09
  4. Step 4: Simplify right side
    2,140.91x = 2,421,956.10
  5. Step 5: Solve for x
    x = 2,421,956.10/2,140.91
  6. Step 6: Final answer
    x = 1,131.27

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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.