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Finding the Fourth Proportional to 216.21, 298.11 and 204.66

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Solution

The fourth proportional to 216.21, 298.11 and 204.66 is: 282.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    216.21 : 298.11 = 204.66 : x
  2. Step 2: Convert to fraction form
    216.21/298.11 = 204.66/x
  3. Step 3: Cross multiply
    216.21x = 298.11 × 204.66
  4. Step 4: Simplify right side
    216.21x = 61,011.19
  5. Step 5: Solve for x
    x = 61,011.19/216.21
  6. Step 6: Final answer
    x = 282.18

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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.