Home / 2,217.80-3,334.80-1,861.40

Finding the Fourth Proportional to 2,217.80, 3,334.80 and 1,861.40

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Solution

The fourth proportional to 2,217.80, 3,334.80 and 1,861.40 is: 2,798.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,217.80 : 3,334.80 = 1,861.40 : x
  2. Step 2: Convert to fraction form
    2,217.80/3,334.80 = 1,861.40/x
  3. Step 3: Cross multiply
    2,217.80x = 3,334.80 × 1,861.40
  4. Step 4: Simplify right side
    2,217.80x = 6,207,396.72
  5. Step 5: Solve for x
    x = 6,207,396.72/2,217.80
  6. Step 6: Final answer
    x = 2,798.90

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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.