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Finding the Fourth Proportional to 418.12, 627.60 and 201.88

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Solution

The fourth proportional to 418.12, 627.60 and 201.88 is: 303.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.12 : 627.60 = 201.88 : x
  2. Step 2: Convert to fraction form
    418.12/627.60 = 201.88/x
  3. Step 3: Cross multiply
    418.12x = 627.60 × 201.88
  4. Step 4: Simplify right side
    418.12x = 126,699.89
  5. Step 5: Solve for x
    x = 126,699.89/418.12
  6. Step 6: Final answer
    x = 303.02

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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.