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Finding the Fourth Proportional to 1,028.80, 1,543.66 and 481.14

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Solution

The fourth proportional to 1,028.80, 1,543.66 and 481.14 is: 721.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,028.80 : 1,543.66 = 481.14 : x
  2. Step 2: Convert to fraction form
    1,028.80/1,543.66 = 481.14/x
  3. Step 3: Cross multiply
    1,028.80x = 1,543.66 × 481.14
  4. Step 4: Simplify right side
    1,028.80x = 742,716.57
  5. Step 5: Solve for x
    x = 742,716.57/1,028.80
  6. Step 6: Final answer
    x = 721.93

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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.