Home / 2,215.13-3,321.68-827.45

Finding the Fourth Proportional to 2,215.13, 3,321.68 and 827.45

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Solution

The fourth proportional to 2,215.13, 3,321.68 and 827.45 is: 1,240.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,215.13 : 3,321.68 = 827.45 : x
  2. Step 2: Convert to fraction form
    2,215.13/3,321.68 = 827.45/x
  3. Step 3: Cross multiply
    2,215.13x = 3,321.68 × 827.45
  4. Step 4: Simplify right side
    2,215.13x = 2,748,518.93
  5. Step 5: Solve for x
    x = 2,748,518.93/2,215.13
  6. Step 6: Final answer
    x = 1,240.79

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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.