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Finding the Fourth Proportional to 1,202.79, 1,804.25 and 381.18

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Solution

The fourth proportional to 1,202.79, 1,804.25 and 381.18 is: 571.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,202.79 : 1,804.25 = 381.18 : x
  2. Step 2: Convert to fraction form
    1,202.79/1,804.25 = 381.18/x
  3. Step 3: Cross multiply
    1,202.79x = 1,804.25 × 381.18
  4. Step 4: Simplify right side
    1,202.79x = 687,744.02
  5. Step 5: Solve for x
    x = 687,744.02/1,202.79
  6. Step 6: Final answer
    x = 571.79

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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.