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Finding the Fourth Proportional to 401.24, 601.86 and 108.75

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Solution

The fourth proportional to 401.24, 601.86 and 108.75 is: 163.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.24 : 601.86 = 108.75 : x
  2. Step 2: Convert to fraction form
    401.24/601.86 = 108.75/x
  3. Step 3: Cross multiply
    401.24x = 601.86 × 108.75
  4. Step 4: Simplify right side
    401.24x = 65,451.73
  5. Step 5: Solve for x
    x = 65,451.73/401.24
  6. Step 6: Final answer
    x = 163.13

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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.