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Finding the Fourth Proportional to 1,202.79, 1,804.20 and 381.14

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Solution

The fourth proportional to 1,202.79, 1,804.20 and 381.14 is: 571.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,202.79 : 1,804.20 = 381.14 : x
  2. Step 2: Convert to fraction form
    1,202.79/1,804.20 = 381.14/x
  3. Step 3: Cross multiply
    1,202.79x = 1,804.20 × 381.14
  4. Step 4: Simplify right side
    1,202.79x = 687,641.86
  5. Step 5: Solve for x
    x = 687,641.86/1,202.79
  6. Step 6: Final answer
    x = 571.71

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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.