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Finding the Fourth Proportional to 638.22, 880.44 and 451.71

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Solution

The fourth proportional to 638.22, 880.44 and 451.71 is: 623.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.22 : 880.44 = 451.71 : x
  2. Step 2: Convert to fraction form
    638.22/880.44 = 451.71/x
  3. Step 3: Cross multiply
    638.22x = 880.44 × 451.71
  4. Step 4: Simplify right side
    638.22x = 397,703.55
  5. Step 5: Solve for x
    x = 397,703.55/638.22
  6. Step 6: Final answer
    x = 623.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.