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Finding the Fourth Proportional to 354.95, 531.92 and 330.86

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Solution

The fourth proportional to 354.95, 531.92 and 330.86 is: 495.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.95 : 531.92 = 330.86 : x
  2. Step 2: Convert to fraction form
    354.95/531.92 = 330.86/x
  3. Step 3: Cross multiply
    354.95x = 531.92 × 330.86
  4. Step 4: Simplify right side
    354.95x = 175,989.40
  5. Step 5: Solve for x
    x = 175,989.40/354.95
  6. Step 6: Final answer
    x = 495.81

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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.