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Finding the Fourth Proportional to 375.68, 518.28 and 220.16

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Solution

The fourth proportional to 375.68, 518.28 and 220.16 is: 303.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    375.68 : 518.28 = 220.16 : x
  2. Step 2: Convert to fraction form
    375.68/518.28 = 220.16/x
  3. Step 3: Cross multiply
    375.68x = 518.28 × 220.16
  4. Step 4: Simplify right side
    375.68x = 114,104.52
  5. Step 5: Solve for x
    x = 114,104.52/375.68
  6. Step 6: Final answer
    x = 303.73

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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.