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Finding the Fourth Proportional to 379.39, 569.12 and 119.40

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Solution

The fourth proportional to 379.39, 569.12 and 119.40 is: 179.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.39 : 569.12 = 119.40 : x
  2. Step 2: Convert to fraction form
    379.39/569.12 = 119.40/x
  3. Step 3: Cross multiply
    379.39x = 569.12 × 119.40
  4. Step 4: Simplify right side
    379.39x = 67,950.94
  5. Step 5: Solve for x
    x = 67,950.94/379.39
  6. Step 6: Final answer
    x = 179.11

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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.