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Finding the Fourth Proportional to 351.92, 528.21 and 268.88

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Solution

The fourth proportional to 351.92, 528.21 and 268.88 is: 403.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.92 : 528.21 = 268.88 : x
  2. Step 2: Convert to fraction form
    351.92/528.21 = 268.88/x
  3. Step 3: Cross multiply
    351.92x = 528.21 × 268.88
  4. Step 4: Simplify right side
    351.92x = 142,022.46
  5. Step 5: Solve for x
    x = 142,022.46/351.92
  6. Step 6: Final answer
    x = 403.57

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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.