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Finding the Fourth Proportional to 1,183.33, 1,633.31 and 711.25

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Solution

The fourth proportional to 1,183.33, 1,633.31 and 711.25 is: 981.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,183.33 : 1,633.31 = 711.25 : x
  2. Step 2: Convert to fraction form
    1,183.33/1,633.31 = 711.25/x
  3. Step 3: Cross multiply
    1,183.33x = 1,633.31 × 711.25
  4. Step 4: Simplify right side
    1,183.33x = 1,161,691.74
  5. Step 5: Solve for x
    x = 1,161,691.74/1,183.33
  6. Step 6: Final answer
    x = 981.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.