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Finding the Fourth Proportional to 379.66, 569.06 and 271.38

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Solution

The fourth proportional to 379.66, 569.06 and 271.38 is: 406.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.66 : 569.06 = 271.38 : x
  2. Step 2: Convert to fraction form
    379.66/569.06 = 271.38/x
  3. Step 3: Cross multiply
    379.66x = 569.06 × 271.38
  4. Step 4: Simplify right side
    379.66x = 154,431.50
  5. Step 5: Solve for x
    x = 154,431.50/379.66
  6. Step 6: Final answer
    x = 406.76

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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.