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Finding the Fourth Proportional to 1,327.87, 1,991.35 and 635.32

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Solution

The fourth proportional to 1,327.87, 1,991.35 and 635.32 is: 952.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,327.87 : 1,991.35 = 635.32 : x
  2. Step 2: Convert to fraction form
    1,327.87/1,991.35 = 635.32/x
  3. Step 3: Cross multiply
    1,327.87x = 1,991.35 × 635.32
  4. Step 4: Simplify right side
    1,327.87x = 1,265,144.48
  5. Step 5: Solve for x
    x = 1,265,144.48/1,327.87
  6. Step 6: Final answer
    x = 952.76

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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.