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Finding the Fourth Proportional to 380.82, 571.53 and 218.82

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Solution

The fourth proportional to 380.82, 571.53 and 218.82 is: 328.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.82 : 571.53 = 218.82 : x
  2. Step 2: Convert to fraction form
    380.82/571.53 = 218.82/x
  3. Step 3: Cross multiply
    380.82x = 571.53 × 218.82
  4. Step 4: Simplify right side
    380.82x = 125,062.19
  5. Step 5: Solve for x
    x = 125,062.19/380.82
  6. Step 6: Final answer
    x = 328.40

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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.