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Finding the Fourth Proportional to 401.13, 601.74 and 141.12

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Solution

The fourth proportional to 401.13, 601.74 and 141.12 is: 211.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.13 : 601.74 = 141.12 : x
  2. Step 2: Convert to fraction form
    401.13/601.74 = 141.12/x
  3. Step 3: Cross multiply
    401.13x = 601.74 × 141.12
  4. Step 4: Simplify right side
    401.13x = 84,917.55
  5. Step 5: Solve for x
    x = 84,917.55/401.13
  6. Step 6: Final answer
    x = 211.70

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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.