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Finding the Fourth Proportional to 636.47, 954.71 and 311.75

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Solution

The fourth proportional to 636.47, 954.71 and 311.75 is: 467.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.47 : 954.71 = 311.75 : x
  2. Step 2: Convert to fraction form
    636.47/954.71 = 311.75/x
  3. Step 3: Cross multiply
    636.47x = 954.71 × 311.75
  4. Step 4: Simplify right side
    636.47x = 297,630.84
  5. Step 5: Solve for x
    x = 297,630.84/636.47
  6. Step 6: Final answer
    x = 467.63

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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.