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Finding the Fourth Proportional to 351.26, 525.78 and 213.86

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Solution

The fourth proportional to 351.26, 525.78 and 213.86 is: 320.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.26 : 525.78 = 213.86 : x
  2. Step 2: Convert to fraction form
    351.26/525.78 = 213.86/x
  3. Step 3: Cross multiply
    351.26x = 525.78 × 213.86
  4. Step 4: Simplify right side
    351.26x = 112,443.31
  5. Step 5: Solve for x
    x = 112,443.31/351.26
  6. Step 6: Final answer
    x = 320.11

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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.