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Finding the Fourth Proportional to 636.79, 954.61 and 513.17

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Solution

The fourth proportional to 636.79, 954.61 and 513.17 is: 769.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.79 : 954.61 = 513.17 : x
  2. Step 2: Convert to fraction form
    636.79/954.61 = 513.17/x
  3. Step 3: Cross multiply
    636.79x = 954.61 × 513.17
  4. Step 4: Simplify right side
    636.79x = 489,882.37
  5. Step 5: Solve for x
    x = 489,882.37/636.79
  6. Step 6: Final answer
    x = 769.30

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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.