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Finding the Fourth Proportional to 370.88, 556.34 and 217.11

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Solution

The fourth proportional to 370.88, 556.34 and 217.11 is: 325.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    370.88 : 556.34 = 217.11 : x
  2. Step 2: Convert to fraction form
    370.88/556.34 = 217.11/x
  3. Step 3: Cross multiply
    370.88x = 556.34 × 217.11
  4. Step 4: Simplify right side
    370.88x = 120,787.98
  5. Step 5: Solve for x
    x = 120,787.98/370.88
  6. Step 6: Final answer
    x = 325.68

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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.