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Finding the Fourth Proportional to 366.38, 549.78 and 220.18

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Solution

The fourth proportional to 366.38, 549.78 and 220.18 is: 330.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    366.38 : 549.78 = 220.18 : x
  2. Step 2: Convert to fraction form
    366.38/549.78 = 220.18/x
  3. Step 3: Cross multiply
    366.38x = 549.78 × 220.18
  4. Step 4: Simplify right side
    366.38x = 121,050.56
  5. Step 5: Solve for x
    x = 121,050.56/366.38
  6. Step 6: Final answer
    x = 330.40

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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.