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Finding the Fourth Proportional to 354.42, 531.77 and 217.53

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Solution

The fourth proportional to 354.42, 531.77 and 217.53 is: 326.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.42 : 531.77 = 217.53 : x
  2. Step 2: Convert to fraction form
    354.42/531.77 = 217.53/x
  3. Step 3: Cross multiply
    354.42x = 531.77 × 217.53
  4. Step 4: Simplify right side
    354.42x = 115,674.84
  5. Step 5: Solve for x
    x = 115,674.84/354.42
  6. Step 6: Final answer
    x = 326.38

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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.