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Finding the Fourth Proportional to 380.60, 571.05 and 226.60

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Solution

The fourth proportional to 380.60, 571.05 and 226.60 is: 339.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.60 : 571.05 = 226.60 : x
  2. Step 2: Convert to fraction form
    380.60/571.05 = 226.60/x
  3. Step 3: Cross multiply
    380.60x = 571.05 × 226.60
  4. Step 4: Simplify right side
    380.60x = 129,398.50
  5. Step 5: Solve for x
    x = 129,398.50/380.60
  6. Step 6: Final answer
    x = 339.99

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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.