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Finding the Fourth Proportional to 1,202.91, 1,804.32 and 381.27

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Solution

The fourth proportional to 1,202.91, 1,804.32 and 381.27 is: 571.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,202.91 : 1,804.32 = 381.27 : x
  2. Step 2: Convert to fraction form
    1,202.91/1,804.32 = 381.27/x
  3. Step 3: Cross multiply
    1,202.91x = 1,804.32 × 381.27
  4. Step 4: Simplify right side
    1,202.91x = 687,933.09
  5. Step 5: Solve for x
    x = 687,933.09/1,202.91
  6. Step 6: Final answer
    x = 571.89

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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.