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Finding the Fourth Proportional to 379.64, 571.47 and 323.96

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Solution

The fourth proportional to 379.64, 571.47 and 323.96 is: 487.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    379.64 : 571.47 = 323.96 : x
  2. Step 2: Convert to fraction form
    379.64/571.47 = 323.96/x
  3. Step 3: Cross multiply
    379.64x = 571.47 × 323.96
  4. Step 4: Simplify right side
    379.64x = 185,133.42
  5. Step 5: Solve for x
    x = 185,133.42/379.64
  6. Step 6: Final answer
    x = 487.66

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.