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Finding the Fourth Proportional to 637.22, 955.45 and 220.61

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Solution

The fourth proportional to 637.22, 955.45 and 220.61 is: 330.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.22 : 955.45 = 220.61 : x
  2. Step 2: Convert to fraction form
    637.22/955.45 = 220.61/x
  3. Step 3: Cross multiply
    637.22x = 955.45 × 220.61
  4. Step 4: Simplify right side
    637.22x = 210,784.86
  5. Step 5: Solve for x
    x = 210,784.86/637.22
  6. Step 6: Final answer
    x = 330.79

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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.