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Finding the Fourth Proportional to 1,327.57, 1,989.93 and 633.80

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Solution

The fourth proportional to 1,327.57, 1,989.93 and 633.80 is: 950.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,327.57 : 1,989.93 = 633.80 : x
  2. Step 2: Convert to fraction form
    1,327.57/1,989.93 = 633.80/x
  3. Step 3: Cross multiply
    1,327.57x = 1,989.93 × 633.80
  4. Step 4: Simplify right side
    1,327.57x = 1,261,217.63
  5. Step 5: Solve for x
    x = 1,261,217.63/1,327.57
  6. Step 6: Final answer
    x = 950.02

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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.