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Finding the Fourth Proportional to 571.96, 789.28 and 351.28

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Solution

The fourth proportional to 571.96, 789.28 and 351.28 is: 484.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    571.96 : 789.28 = 351.28 : x
  2. Step 2: Convert to fraction form
    571.96/789.28 = 351.28/x
  3. Step 3: Cross multiply
    571.96x = 789.28 × 351.28
  4. Step 4: Simplify right side
    571.96x = 277,258.28
  5. Step 5: Solve for x
    x = 277,258.28/571.96
  6. Step 6: Final answer
    x = 484.75

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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.