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Finding the Fourth Proportional to 636.18, 953.48 and 343.83

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Solution

The fourth proportional to 636.18, 953.48 and 343.83 is: 515.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.18 : 953.48 = 343.83 : x
  2. Step 2: Convert to fraction form
    636.18/953.48 = 343.83/x
  3. Step 3: Cross multiply
    636.18x = 953.48 × 343.83
  4. Step 4: Simplify right side
    636.18x = 327,833.31
  5. Step 5: Solve for x
    x = 327,833.31/636.18
  6. Step 6: Final answer
    x = 515.32

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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.