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Finding the Fourth Proportional to 636.20, 953.89 and 270.75

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Solution

The fourth proportional to 636.20, 953.89 and 270.75 is: 405.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.20 : 953.89 = 270.75 : x
  2. Step 2: Convert to fraction form
    636.20/953.89 = 270.75/x
  3. Step 3: Cross multiply
    636.20x = 953.89 × 270.75
  4. Step 4: Simplify right side
    636.20x = 258,265.72
  5. Step 5: Solve for x
    x = 258,265.72/636.20
  6. Step 6: Final answer
    x = 405.95

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1.5x scale

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.