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Finding the Fourth Proportional to 401.38, 602.06 and 112.81

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Solution

The fourth proportional to 401.38, 602.06 and 112.81 is: 169.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.38 : 602.06 = 112.81 : x
  2. Step 2: Convert to fraction form
    401.38/602.06 = 112.81/x
  3. Step 3: Cross multiply
    401.38x = 602.06 × 112.81
  4. Step 4: Simplify right side
    401.38x = 67,918.39
  5. Step 5: Solve for x
    x = 67,918.39/401.38
  6. Step 6: Final answer
    x = 169.21

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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.