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Finding the Fourth Proportional to 967.38, 1,335.62 and 636.38

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Solution

The fourth proportional to 967.38, 1,335.62 and 636.38 is: 878.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    967.38 : 1,335.62 = 636.38 : x
  2. Step 2: Convert to fraction form
    967.38/1,335.62 = 636.38/x
  3. Step 3: Cross multiply
    967.38x = 1,335.62 × 636.38
  4. Step 4: Simplify right side
    967.38x = 849,952.00
  5. Step 5: Solve for x
    x = 849,952.00/967.38
  6. Step 6: Final answer
    x = 878.61

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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.