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Finding the Fourth Proportional to 755.06, 1,131.62 and 668.06

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Solution

The fourth proportional to 755.06, 1,131.62 and 668.06 is: 1,001.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    755.06 : 1,131.62 = 668.06 : x
  2. Step 2: Convert to fraction form
    755.06/1,131.62 = 668.06/x
  3. Step 3: Cross multiply
    755.06x = 1,131.62 × 668.06
  4. Step 4: Simplify right side
    755.06x = 755,990.06
  5. Step 5: Solve for x
    x = 755,990.06/755.06
  6. Step 6: Final answer
    x = 1,001.23

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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.