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Finding the Fourth Proportional to 219.46, 303.21 and 217.30

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Solution

The fourth proportional to 219.46, 303.21 and 217.30 is: 300.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    219.46 : 303.21 = 217.30 : x
  2. Step 2: Convert to fraction form
    219.46/303.21 = 217.30/x
  3. Step 3: Cross multiply
    219.46x = 303.21 × 217.30
  4. Step 4: Simplify right side
    219.46x = 65,887.34
  5. Step 5: Solve for x
    x = 65,887.34/219.46
  6. Step 6: Final answer
    x = 300.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.