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Finding the Fourth Proportional to 638.62, 957.49 and 222.04

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Solution

The fourth proportional to 638.62, 957.49 and 222.04 is: 332.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.62 : 957.49 = 222.04 : x
  2. Step 2: Convert to fraction form
    638.62/957.49 = 222.04/x
  3. Step 3: Cross multiply
    638.62x = 957.49 × 222.04
  4. Step 4: Simplify right side
    638.62x = 212,602.55
  5. Step 5: Solve for x
    x = 212,602.55/638.62
  6. Step 6: Final answer
    x = 332.91

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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.