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Finding the Fourth Proportional to 427.92, 641.06 and 222.18

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Solution

The fourth proportional to 427.92, 641.06 and 222.18 is: 332.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    427.92 : 641.06 = 222.18 : x
  2. Step 2: Convert to fraction form
    427.92/641.06 = 222.18/x
  3. Step 3: Cross multiply
    427.92x = 641.06 × 222.18
  4. Step 4: Simplify right side
    427.92x = 142,429.60
  5. Step 5: Solve for x
    x = 142,429.60/427.92
  6. Step 6: Final answer
    x = 332.84

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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.