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Finding the Fourth Proportional to 356.44, 535.48 and 212.26

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Solution

The fourth proportional to 356.44, 535.48 and 212.26 is: 318.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.44 : 535.48 = 212.26 : x
  2. Step 2: Convert to fraction form
    356.44/535.48 = 212.26/x
  3. Step 3: Cross multiply
    356.44x = 535.48 × 212.26
  4. Step 4: Simplify right side
    356.44x = 113,660.98
  5. Step 5: Solve for x
    x = 113,660.98/356.44
  6. Step 6: Final answer
    x = 318.88

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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.