Home / 2,215.16-3,320.61-828.11

Finding the Fourth Proportional to 2,215.16, 3,320.61 and 828.11

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Solution

The fourth proportional to 2,215.16, 3,320.61 and 828.11 is: 1,241.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,215.16 : 3,320.61 = 828.11 : x
  2. Step 2: Convert to fraction form
    2,215.16/3,320.61 = 828.11/x
  3. Step 3: Cross multiply
    2,215.16x = 3,320.61 × 828.11
  4. Step 4: Simplify right side
    2,215.16x = 2,749,830.35
  5. Step 5: Solve for x
    x = 2,749,830.35/2,215.16
  6. Step 6: Final answer
    x = 1,241.37

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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.