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Finding the Fourth Proportional to 433.25, 649.86 and 108.61

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Solution

The fourth proportional to 433.25, 649.86 and 108.61 is: 162.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    433.25 : 649.86 = 108.61 : x
  2. Step 2: Convert to fraction form
    433.25/649.86 = 108.61/x
  3. Step 3: Cross multiply
    433.25x = 649.86 × 108.61
  4. Step 4: Simplify right side
    433.25x = 70,579.67
  5. Step 5: Solve for x
    x = 70,579.67/433.25
  6. Step 6: Final answer
    x = 162.91

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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.