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Finding the Fourth Proportional to 606.38, 909.57 and 221.63

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Solution

The fourth proportional to 606.38, 909.57 and 221.63 is: 332.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    606.38 : 909.57 = 221.63 : x
  2. Step 2: Convert to fraction form
    606.38/909.57 = 221.63/x
  3. Step 3: Cross multiply
    606.38x = 909.57 × 221.63
  4. Step 4: Simplify right side
    606.38x = 201,583.45
  5. Step 5: Solve for x
    x = 201,583.45/606.38
  6. Step 6: Final answer
    x = 332.44

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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.