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Finding the Fourth Proportional to 247.11, 370.62 and 219.93

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Solution

The fourth proportional to 247.11, 370.62 and 219.93 is: 329.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.11 : 370.62 = 219.93 : x
  2. Step 2: Convert to fraction form
    247.11/370.62 = 219.93/x
  3. Step 3: Cross multiply
    247.11x = 370.62 × 219.93
  4. Step 4: Simplify right side
    247.11x = 81,510.46
  5. Step 5: Solve for x
    x = 81,510.46/247.11
  6. Step 6: Final answer
    x = 329.85

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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.