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Finding the Fourth Proportional to 1,110.73, 1,665.62 and 380.38

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Solution

The fourth proportional to 1,110.73, 1,665.62 and 380.38 is: 570.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,110.73 : 1,665.62 = 380.38 : x
  2. Step 2: Convert to fraction form
    1,110.73/1,665.62 = 380.38/x
  3. Step 3: Cross multiply
    1,110.73x = 1,665.62 × 380.38
  4. Step 4: Simplify right side
    1,110.73x = 633,568.54
  5. Step 5: Solve for x
    x = 633,568.54/1,110.73
  6. Step 6: Final answer
    x = 570.41

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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.