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Finding the Fourth Proportional to 379.69, 569.63 and 163.42

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Solution

The fourth proportional to 379.69, 569.63 and 163.42 is: 245.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.69 : 569.63 = 163.42 : x
  2. Step 2: Convert to fraction form
    379.69/569.63 = 163.42/x
  3. Step 3: Cross multiply
    379.69x = 569.63 × 163.42
  4. Step 4: Simplify right side
    379.69x = 93,087.92
  5. Step 5: Solve for x
    x = 93,087.92/379.69
  6. Step 6: Final answer
    x = 245.17

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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.