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Finding the Fourth Proportional to 221.44, 330.48 and 207.16

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Solution

The fourth proportional to 221.44, 330.48 and 207.16 is: 309.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.44 : 330.48 = 207.16 : x
  2. Step 2: Convert to fraction form
    221.44/330.48 = 207.16/x
  3. Step 3: Cross multiply
    221.44x = 330.48 × 207.16
  4. Step 4: Simplify right side
    221.44x = 68,462.24
  5. Step 5: Solve for x
    x = 68,462.24/221.44
  6. Step 6: Final answer
    x = 309.17

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.