Home / 3,215.40-4,821.90-2,238.60

Finding the Fourth Proportional to 3,215.40, 4,821.90 and 2,238.60

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Solution

The fourth proportional to 3,215.40, 4,821.90 and 2,238.60 is: 3,357.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,215.40 : 4,821.90 = 2,238.60 : x
  2. Step 2: Convert to fraction form
    3,215.40/4,821.90 = 2,238.60/x
  3. Step 3: Cross multiply
    3,215.40x = 4,821.90 × 2,238.60
  4. Step 4: Simplify right side
    3,215.40x = 10,794,305.34
  5. Step 5: Solve for x
    x = 10,794,305.34/3,215.40
  6. Step 6: Final answer
    x = 3,357.06

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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.