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Finding the Fourth Proportional to 1,329.41, 1,992.10 and 635.12

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Solution

The fourth proportional to 1,329.41, 1,992.10 and 635.12 is: 951.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,329.41 : 1,992.10 = 635.12 : x
  2. Step 2: Convert to fraction form
    1,329.41/1,992.10 = 635.12/x
  3. Step 3: Cross multiply
    1,329.41x = 1,992.10 × 635.12
  4. Step 4: Simplify right side
    1,329.41x = 1,265,224.36
  5. Step 5: Solve for x
    x = 1,265,224.36/1,329.41
  6. Step 6: Final answer
    x = 951.72

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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.