Home / 2,861.18-4,290.63-1,217.78

Finding the Fourth Proportional to 2,861.18, 4,290.63 and 1,217.78

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Solution

The fourth proportional to 2,861.18, 4,290.63 and 1,217.78 is: 1,826.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,861.18 : 4,290.63 = 1,217.78 : x
  2. Step 2: Convert to fraction form
    2,861.18/4,290.63 = 1,217.78/x
  3. Step 3: Cross multiply
    2,861.18x = 4,290.63 × 1,217.78
  4. Step 4: Simplify right side
    2,861.18x = 5,225,021.95
  5. Step 5: Solve for x
    x = 5,225,021.95/2,861.18
  6. Step 6: Final answer
    x = 1,826.18

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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.