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Finding the Fourth Proportional to 370.80, 556.19 and 217.79

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Solution

The fourth proportional to 370.80, 556.19 and 217.79 is: 326.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.80 : 556.19 = 217.79 : x
  2. Step 2: Convert to fraction form
    370.80/556.19 = 217.79/x
  3. Step 3: Cross multiply
    370.80x = 556.19 × 217.79
  4. Step 4: Simplify right side
    370.80x = 121,132.62
  5. Step 5: Solve for x
    x = 121,132.62/370.80
  6. Step 6: Final answer
    x = 326.68

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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.