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Finding the Fourth Proportional to 755.29, 1,131.00 and 447.36

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Solution

The fourth proportional to 755.29, 1,131.00 and 447.36 is: 669.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    755.29 : 1,131.00 = 447.36 : x
  2. Step 2: Convert to fraction form
    755.29/1,131.00 = 447.36/x
  3. Step 3: Cross multiply
    755.29x = 1,131.00 × 447.36
  4. Step 4: Simplify right side
    755.29x = 505,964.60
  5. Step 5: Solve for x
    x = 505,964.60/755.29
  6. Step 6: Final answer
    x = 669.90

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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.