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Finding the Fourth Proportional to 755.49, 1,131.21 and 633.99

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Solution

The fourth proportional to 755.49, 1,131.21 and 633.99 is: 949.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    755.49 : 1,131.21 = 633.99 : x
  2. Step 2: Convert to fraction form
    755.49/1,131.21 = 633.99/x
  3. Step 3: Cross multiply
    755.49x = 1,131.21 × 633.99
  4. Step 4: Simplify right side
    755.49x = 717,175.83
  5. Step 5: Solve for x
    x = 717,175.83/755.49
  6. Step 6: Final answer
    x = 949.29

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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.