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Finding the Fourth Proportional to 353.96, 531.20 and 351.28

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Solution

The fourth proportional to 353.96, 531.20 and 351.28 is: 527.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    353.96 : 531.20 = 351.28 : x
  2. Step 2: Convert to fraction form
    353.96/531.20 = 351.28/x
  3. Step 3: Cross multiply
    353.96x = 531.20 × 351.28
  4. Step 4: Simplify right side
    353.96x = 186,599.94
  5. Step 5: Solve for x
    x = 186,599.94/353.96
  6. Step 6: Final answer
    x = 527.18

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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.