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Finding the Fourth Proportional to 354.79, 531.51 and 217.63

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Solution

The fourth proportional to 354.79, 531.51 and 217.63 is: 326.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.79 : 531.51 = 217.63 : x
  2. Step 2: Convert to fraction form
    354.79/531.51 = 217.63/x
  3. Step 3: Cross multiply
    354.79x = 531.51 × 217.63
  4. Step 4: Simplify right side
    354.79x = 115,672.52
  5. Step 5: Solve for x
    x = 115,672.52/354.79
  6. Step 6: Final answer
    x = 326.03

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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.