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Finding the Fourth Proportional to 950.77, 1,310.79 and 636.09

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Solution

The fourth proportional to 950.77, 1,310.79 and 636.09 is: 876.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    950.77 : 1,310.79 = 636.09 : x
  2. Step 2: Convert to fraction form
    950.77/1,310.79 = 636.09/x
  3. Step 3: Cross multiply
    950.77x = 1,310.79 × 636.09
  4. Step 4: Simplify right side
    950.77x = 833,780.41
  5. Step 5: Solve for x
    x = 833,780.41/950.77
  6. Step 6: Final answer
    x = 876.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.