Home / 3,120.17-4,306.38-1,861.30

Finding the Fourth Proportional to 3,120.17, 4,306.38 and 1,861.30

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Solution

The fourth proportional to 3,120.17, 4,306.38 and 1,861.30 is: 2,568.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.17 : 4,306.38 = 1,861.30 : x
  2. Step 2: Convert to fraction form
    3,120.17/4,306.38 = 1,861.30/x
  3. Step 3: Cross multiply
    3,120.17x = 4,306.38 × 1,861.30
  4. Step 4: Simplify right side
    3,120.17x = 8,015,465.09
  5. Step 5: Solve for x
    x = 8,015,465.09/3,120.17
  6. Step 6: Final answer
    x = 2,568.92

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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.