Home / 2,821.18-4,231.90-1,711.78

Finding the Fourth Proportional to 2,821.18, 4,231.90 and 1,711.78

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Solution

The fourth proportional to 2,821.18, 4,231.90 and 1,711.78 is: 2,567.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,821.18 : 4,231.90 = 1,711.78 : x
  2. Step 2: Convert to fraction form
    2,821.18/4,231.90 = 1,711.78/x
  3. Step 3: Cross multiply
    2,821.18x = 4,231.90 × 1,711.78
  4. Step 4: Simplify right side
    2,821.18x = 7,244,096.64
  5. Step 5: Solve for x
    x = 7,244,096.64/2,821.18
  6. Step 6: Final answer
    x = 2,567.75

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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.