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Finding the Fourth Proportional to 418.59, 627.68 and 235.85

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Solution

The fourth proportional to 418.59, 627.68 and 235.85 is: 353.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.59 : 627.68 = 235.85 : x
  2. Step 2: Convert to fraction form
    418.59/627.68 = 235.85/x
  3. Step 3: Cross multiply
    418.59x = 627.68 × 235.85
  4. Step 4: Simplify right side
    418.59x = 148,035.78
  5. Step 5: Solve for x
    x = 148,035.78/418.59
  6. Step 6: Final answer
    x = 353.65

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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.