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Finding the Fourth Proportional to 755.03, 1,126.54 and 662.69

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Solution

The fourth proportional to 755.03, 1,126.54 and 662.69 is: 988.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    755.03 : 1,126.54 = 662.69 : x
  2. Step 2: Convert to fraction form
    755.03/1,126.54 = 662.69/x
  3. Step 3: Cross multiply
    755.03x = 1,126.54 × 662.69
  4. Step 4: Simplify right side
    755.03x = 746,546.79
  5. Step 5: Solve for x
    x = 746,546.79/755.03
  6. Step 6: Final answer
    x = 988.76

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.