Home / 2,148.35-3,218.28-1,221.11

Finding the Fourth Proportional to 2,148.35, 3,218.28 and 1,221.11

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Solution

The fourth proportional to 2,148.35, 3,218.28 and 1,221.11 is: 1,829.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,148.35 : 3,218.28 = 1,221.11 : x
  2. Step 2: Convert to fraction form
    2,148.35/3,218.28 = 1,221.11/x
  3. Step 3: Cross multiply
    2,148.35x = 3,218.28 × 1,221.11
  4. Step 4: Simplify right side
    2,148.35x = 3,929,873.89
  5. Step 5: Solve for x
    x = 3,929,873.89/2,148.35
  6. Step 6: Final answer
    x = 1,829.25

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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.