Home / 3,181.90-4,772.85-2,145.10

Finding the Fourth Proportional to 3,181.90, 4,772.85 and 2,145.10

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Solution

The fourth proportional to 3,181.90, 4,772.85 and 2,145.10 is: 3,217.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,181.90 : 4,772.85 = 2,145.10 : x
  2. Step 2: Convert to fraction form
    3,181.90/4,772.85 = 2,145.10/x
  3. Step 3: Cross multiply
    3,181.90x = 4,772.85 × 2,145.10
  4. Step 4: Simplify right side
    3,181.90x = 10,238,240.54
  5. Step 5: Solve for x
    x = 10,238,240.54/3,181.90
  6. Step 6: Final answer
    x = 3,217.65

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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.