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Finding the Fourth Proportional to 423.11, 636.04 and 379.98

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Solution

The fourth proportional to 423.11, 636.04 and 379.98 is: 571.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.11 : 636.04 = 379.98 : x
  2. Step 2: Convert to fraction form
    423.11/636.04 = 379.98/x
  3. Step 3: Cross multiply
    423.11x = 636.04 × 379.98
  4. Step 4: Simplify right side
    423.11x = 241,680.82
  5. Step 5: Solve for x
    x = 241,680.82/423.11
  6. Step 6: Final answer
    x = 571.20

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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.