Home / 2,811.33-4,219.58-1,425.65

Finding the Fourth Proportional to 2,811.33, 4,219.58 and 1,425.65

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Solution

The fourth proportional to 2,811.33, 4,219.58 and 1,425.65 is: 2,139.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.33 : 4,219.58 = 1,425.65 : x
  2. Step 2: Convert to fraction form
    2,811.33/4,219.58 = 1,425.65/x
  3. Step 3: Cross multiply
    2,811.33x = 4,219.58 × 1,425.65
  4. Step 4: Simplify right side
    2,811.33x = 6,015,644.23
  5. Step 5: Solve for x
    x = 6,015,644.23/2,811.33
  6. Step 6: Final answer
    x = 2,139.79

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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.