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Finding the Fourth Proportional to 755.64, 1,132.14 and 481.08

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Solution

The fourth proportional to 755.64, 1,132.14 and 481.08 is: 720.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    755.64 : 1,132.14 = 481.08 : x
  2. Step 2: Convert to fraction form
    755.64/1,132.14 = 481.08/x
  3. Step 3: Cross multiply
    755.64x = 1,132.14 × 481.08
  4. Step 4: Simplify right side
    755.64x = 544,649.91
  5. Step 5: Solve for x
    x = 544,649.91/755.64
  6. Step 6: Final answer
    x = 720.78

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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.