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Finding the Fourth Proportional to 380.62, 570.39 and 218.26

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Solution

The fourth proportional to 380.62, 570.39 and 218.26 is: 327.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.62 : 570.39 = 218.26 : x
  2. Step 2: Convert to fraction form
    380.62/570.39 = 218.26/x
  3. Step 3: Cross multiply
    380.62x = 570.39 × 218.26
  4. Step 4: Simplify right side
    380.62x = 124,493.32
  5. Step 5: Solve for x
    x = 124,493.32/380.62
  6. Step 6: Final answer
    x = 327.08

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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.