Home / 2,231.78-3,079.97-1,435.56

Finding the Fourth Proportional to 2,231.78, 3,079.97 and 1,435.56

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Solution

The fourth proportional to 2,231.78, 3,079.97 and 1,435.56 is: 1,981.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,231.78 : 3,079.97 = 1,435.56 : x
  2. Step 2: Convert to fraction form
    2,231.78/3,079.97 = 1,435.56/x
  3. Step 3: Cross multiply
    2,231.78x = 3,079.97 × 1,435.56
  4. Step 4: Simplify right side
    2,231.78x = 4,421,474.56
  5. Step 5: Solve for x
    x = 4,421,474.56/2,231.78
  6. Step 6: Final answer
    x = 1,981.15

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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.