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Finding the Fourth Proportional to 1,175.21, 1,761.45 and 481.55

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Solution

The fourth proportional to 1,175.21, 1,761.45 and 481.55 is: 721.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,175.21 : 1,761.45 = 481.55 : x
  2. Step 2: Convert to fraction form
    1,175.21/1,761.45 = 481.55/x
  3. Step 3: Cross multiply
    1,175.21x = 1,761.45 × 481.55
  4. Step 4: Simplify right side
    1,175.21x = 848,215.63
  5. Step 5: Solve for x
    x = 848,215.63/1,175.21
  6. Step 6: Final answer
    x = 721.76

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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.