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Finding the Fourth Proportional to 636.72, 949.92 and 622.08

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Solution

The fourth proportional to 636.72, 949.92 and 622.08 is: 928.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.72 : 949.92 = 622.08 : x
  2. Step 2: Convert to fraction form
    636.72/949.92 = 622.08/x
  3. Step 3: Cross multiply
    636.72x = 949.92 × 622.08
  4. Step 4: Simplify right side
    636.72x = 590,926.23
  5. Step 5: Solve for x
    x = 590,926.23/636.72
  6. Step 6: Final answer
    x = 928.08

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.