Home / 2,811.25-4,217.85-1,252.35

Finding the Fourth Proportional to 2,811.25, 4,217.85 and 1,252.35

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Solution

The fourth proportional to 2,811.25, 4,217.85 and 1,252.35 is: 1,878.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.25 : 4,217.85 = 1,252.35 : x
  2. Step 2: Convert to fraction form
    2,811.25/4,217.85 = 1,252.35/x
  3. Step 3: Cross multiply
    2,811.25x = 4,217.85 × 1,252.35
  4. Step 4: Simplify right side
    2,811.25x = 5,282,224.45
  5. Step 5: Solve for x
    x = 5,282,224.45/2,811.25
  6. Step 6: Final answer
    x = 1,878.96

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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.