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Finding the Fourth Proportional to 1,131.24, 1,696.86 and 481.62

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Solution

The fourth proportional to 1,131.24, 1,696.86 and 481.62 is: 722.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,131.24 : 1,696.86 = 481.62 : x
  2. Step 2: Convert to fraction form
    1,131.24/1,696.86 = 481.62/x
  3. Step 3: Cross multiply
    1,131.24x = 1,696.86 × 481.62
  4. Step 4: Simplify right side
    1,131.24x = 817,241.71
  5. Step 5: Solve for x
    x = 817,241.71/1,131.24
  6. Step 6: Final answer
    x = 722.43

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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.