Home / 2,861.10-4,290.67-1,217.20

Finding the Fourth Proportional to 2,861.10, 4,290.67 and 1,217.20

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Solution

The fourth proportional to 2,861.10, 4,290.67 and 1,217.20 is: 1,825.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,861.10 : 4,290.67 = 1,217.20 : x
  2. Step 2: Convert to fraction form
    2,861.10/4,290.67 = 1,217.20/x
  3. Step 3: Cross multiply
    2,861.10x = 4,290.67 × 1,217.20
  4. Step 4: Simplify right side
    2,861.10x = 5,222,603.52
  5. Step 5: Solve for x
    x = 5,222,603.52/2,861.10
  6. Step 6: Final answer
    x = 1,825.38

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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.