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Finding the Fourth Proportional to 387.34, 580.26 and 367.66

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Solution

The fourth proportional to 387.34, 580.26 and 367.66 is: 550.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.34 : 580.26 = 367.66 : x
  2. Step 2: Convert to fraction form
    387.34/580.26 = 367.66/x
  3. Step 3: Cross multiply
    387.34x = 580.26 × 367.66
  4. Step 4: Simplify right side
    387.34x = 213,338.39
  5. Step 5: Solve for x
    x = 213,338.39/387.34
  6. Step 6: Final answer
    x = 550.78

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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.