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Finding the Fourth Proportional to 606.77, 909.61 and 221.75

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Solution

The fourth proportional to 606.77, 909.61 and 221.75 is: 332.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    606.77 : 909.61 = 221.75 : x
  2. Step 2: Convert to fraction form
    606.77/909.61 = 221.75/x
  3. Step 3: Cross multiply
    606.77x = 909.61 × 221.75
  4. Step 4: Simplify right side
    606.77x = 201,706.02
  5. Step 5: Solve for x
    x = 201,706.02/606.77
  6. Step 6: Final answer
    x = 332.43

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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.