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Finding the Fourth Proportional to 633.88, 949.38 and 505.72

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Solution

The fourth proportional to 633.88, 949.38 and 505.72 is: 757.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    633.88 : 949.38 = 505.72 : x
  2. Step 2: Convert to fraction form
    633.88/949.38 = 505.72/x
  3. Step 3: Cross multiply
    633.88x = 949.38 × 505.72
  4. Step 4: Simplify right side
    633.88x = 480,120.45
  5. Step 5: Solve for x
    x = 480,120.45/633.88
  6. Step 6: Final answer
    x = 757.43

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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.