Home / 3,218.70-4,819.95-2,117.10

Finding the Fourth Proportional to 3,218.70, 4,819.95 and 2,117.10

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Solution

The fourth proportional to 3,218.70, 4,819.95 and 2,117.10 is: 3,170.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,218.70 : 4,819.95 = 2,117.10 : x
  2. Step 2: Convert to fraction form
    3,218.70/4,819.95 = 2,117.10/x
  3. Step 3: Cross multiply
    3,218.70x = 4,819.95 × 2,117.10
  4. Step 4: Simplify right side
    3,218.70x = 10,204,316.15
  5. Step 5: Solve for x
    x = 10,204,316.15/3,218.70
  6. Step 6: Final answer
    x = 3,170.32

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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.