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Finding the Fourth Proportional to 379.47, 569.31 and 119.48

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Solution

The fourth proportional to 379.47, 569.31 and 119.48 is: 179.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.47 : 569.31 = 119.48 : x
  2. Step 2: Convert to fraction form
    379.47/569.31 = 119.48/x
  3. Step 3: Cross multiply
    379.47x = 569.31 × 119.48
  4. Step 4: Simplify right side
    379.47x = 68,020.56
  5. Step 5: Solve for x
    x = 68,020.56/379.47
  6. Step 6: Final answer
    x = 179.25

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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.