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Finding the Fourth Proportional to 636.66, 954.89 and 394.67

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Solution

The fourth proportional to 636.66, 954.89 and 394.67 is: 591.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.66 : 954.89 = 394.67 : x
  2. Step 2: Convert to fraction form
    636.66/954.89 = 394.67/x
  3. Step 3: Cross multiply
    636.66x = 954.89 × 394.67
  4. Step 4: Simplify right side
    636.66x = 376,868.33
  5. Step 5: Solve for x
    x = 376,868.33/636.66
  6. Step 6: Final answer
    x = 591.95

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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.