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Finding the Fourth Proportional to 2,221.97, 3,333 and 578.42

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Solution

The fourth proportional to 2,221.97, 3,333 and 578.42 is: 867.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,221.97 : 3,333 = 578.42 : x
  2. Step 2: Convert to fraction form
    2,221.97/3,333 = 578.42/x
  3. Step 3: Cross multiply
    2,221.97x = 3,333 × 578.42
  4. Step 4: Simplify right side
    2,221.97x = 1,927,873.86
  5. Step 5: Solve for x
    x = 1,927,873.86/2,221.97
  6. Step 6: Final answer
    x = 867.64

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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.