Home / 3,219.10-4,828.65-2,489.20

Finding the Fourth Proportional to 3,219.10, 4,828.65 and 2,489.20

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Solution

The fourth proportional to 3,219.10, 4,828.65 and 2,489.20 is: 3,733.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,219.10 : 4,828.65 = 2,489.20 : x
  2. Step 2: Convert to fraction form
    3,219.10/4,828.65 = 2,489.20/x
  3. Step 3: Cross multiply
    3,219.10x = 4,828.65 × 2,489.20
  4. Step 4: Simplify right side
    3,219.10x = 12,019,475.58
  5. Step 5: Solve for x
    x = 12,019,475.58/3,219.10
  6. Step 6: Final answer
    x = 3,733.80

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Similar ratio
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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.