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Finding the Fourth Proportional to 354.12, 531.30 and 191.94

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Solution

The fourth proportional to 354.12, 531.30 and 191.94 is: 287.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.12 : 531.30 = 191.94 : x
  2. Step 2: Convert to fraction form
    354.12/531.30 = 191.94/x
  3. Step 3: Cross multiply
    354.12x = 531.30 × 191.94
  4. Step 4: Simplify right side
    354.12x = 101,977.72
  5. Step 5: Solve for x
    x = 101,977.72/354.12
  6. Step 6: Final answer
    x = 287.98

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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.