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Finding the Fourth Proportional to 755.40, 1,132.62 and 481.56

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Solution

The fourth proportional to 755.40, 1,132.62 and 481.56 is: 722.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    755.40 : 1,132.62 = 481.56 : x
  2. Step 2: Convert to fraction form
    755.40/1,132.62 = 481.56/x
  3. Step 3: Cross multiply
    755.40x = 1,132.62 × 481.56
  4. Step 4: Simplify right side
    755.40x = 545,424.49
  5. Step 5: Solve for x
    x = 545,424.49/755.40
  6. Step 6: Final answer
    x = 722.03

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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.