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Finding the Fourth Proportional to 417.78, 626.64 and 201.30

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Solution

The fourth proportional to 417.78, 626.64 and 201.30 is: 301.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.78 : 626.64 = 201.30 : x
  2. Step 2: Convert to fraction form
    417.78/626.64 = 201.30/x
  3. Step 3: Cross multiply
    417.78x = 626.64 × 201.30
  4. Step 4: Simplify right side
    417.78x = 126,142.63
  5. Step 5: Solve for x
    x = 126,142.63/417.78
  6. Step 6: Final answer
    x = 301.94

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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.