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Finding the Fourth Proportional to 401.15, 601.79 and 141.11

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Solution

The fourth proportional to 401.15, 601.79 and 141.11 is: 211.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.15 : 601.79 = 141.11 : x
  2. Step 2: Convert to fraction form
    401.15/601.79 = 141.11/x
  3. Step 3: Cross multiply
    401.15x = 601.79 × 141.11
  4. Step 4: Simplify right side
    401.15x = 84,918.19
  5. Step 5: Solve for x
    x = 84,918.19/401.15
  6. Step 6: Final answer
    x = 211.69

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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.