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Finding the Fourth Proportional to 220.86, 332.10 and 218.16

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Solution

The fourth proportional to 220.86, 332.10 and 218.16 is: 328.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.86 : 332.10 = 218.16 : x
  2. Step 2: Convert to fraction form
    220.86/332.10 = 218.16/x
  3. Step 3: Cross multiply
    220.86x = 332.10 × 218.16
  4. Step 4: Simplify right side
    220.86x = 72,450.94
  5. Step 5: Solve for x
    x = 72,450.94/220.86
  6. Step 6: Final answer
    x = 328.04

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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.