Home / 3,186.99-4,398.21-1,861.20

Finding the Fourth Proportional to 3,186.99, 4,398.21 and 1,861.20

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Solution

The fourth proportional to 3,186.99, 4,398.21 and 1,861.20 is: 2,568.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,186.99 : 4,398.21 = 1,861.20 : x
  2. Step 2: Convert to fraction form
    3,186.99/4,398.21 = 1,861.20/x
  3. Step 3: Cross multiply
    3,186.99x = 4,398.21 × 1,861.20
  4. Step 4: Simplify right side
    3,186.99x = 8,185,948.45
  5. Step 5: Solve for x
    x = 8,185,948.45/3,186.99
  6. Step 6: Final answer
    x = 2,568.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.