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Finding the Fourth Proportional to 638.04, 880.26 and 375.96

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Solution

The fourth proportional to 638.04, 880.26 and 375.96 is: 518.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    638.04 : 880.26 = 375.96 : x
  2. Step 2: Convert to fraction form
    638.04/880.26 = 375.96/x
  3. Step 3: Cross multiply
    638.04x = 880.26 × 375.96
  4. Step 4: Simplify right side
    638.04x = 330,942.55
  5. Step 5: Solve for x
    x = 330,942.55/638.04
  6. Step 6: Final answer
    x = 518.69

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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.