Home / 2,231.80-3,081.28-1,435.48

Finding the Fourth Proportional to 2,231.80, 3,081.28 and 1,435.48

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Solution

The fourth proportional to 2,231.80, 3,081.28 and 1,435.48 is: 1,981.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,231.80 : 3,081.28 = 1,435.48 : x
  2. Step 2: Convert to fraction form
    2,231.80/3,081.28 = 1,435.48/x
  3. Step 3: Cross multiply
    2,231.80x = 3,081.28 × 1,435.48
  4. Step 4: Simplify right side
    2,231.80x = 4,423,115.81
  5. Step 5: Solve for x
    x = 4,423,115.81/2,231.80
  6. Step 6: Final answer
    x = 1,981.86

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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.