Home / 2,811.44-4,215.86-1,641.78

Finding the Fourth Proportional to 2,811.44, 4,215.86 and 1,641.78

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Solution

The fourth proportional to 2,811.44, 4,215.86 and 1,641.78 is: 2,461.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.44 : 4,215.86 = 1,641.78 : x
  2. Step 2: Convert to fraction form
    2,811.44/4,215.86 = 1,641.78/x
  3. Step 3: Cross multiply
    2,811.44x = 4,215.86 × 1,641.78
  4. Step 4: Simplify right side
    2,811.44x = 6,921,514.63
  5. Step 5: Solve for x
    x = 6,921,514.63/2,811.44
  6. Step 6: Final answer
    x = 2,461.91

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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.