Home / 2,215.79-3,321.90-1,228.58

Finding the Fourth Proportional to 2,215.79, 3,321.90 and 1,228.58

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Solution

The fourth proportional to 2,215.79, 3,321.90 and 1,228.58 is: 1,841.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,215.79 : 3,321.90 = 1,228.58 : x
  2. Step 2: Convert to fraction form
    2,215.79/3,321.90 = 1,228.58/x
  3. Step 3: Cross multiply
    2,215.79x = 3,321.90 × 1,228.58
  4. Step 4: Simplify right side
    2,215.79x = 4,081,219.90
  5. Step 5: Solve for x
    x = 4,081,219.90/2,215.79
  6. Step 6: Final answer
    x = 1,841.88

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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.