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Finding the Fourth Proportional to 401.31, 601.86 and 141.27

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Solution

The fourth proportional to 401.31, 601.86 and 141.27 is: 211.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.31 : 601.86 = 141.27 : x
  2. Step 2: Convert to fraction form
    401.31/601.86 = 141.27/x
  3. Step 3: Cross multiply
    401.31x = 601.86 × 141.27
  4. Step 4: Simplify right side
    401.31x = 85,024.76
  5. Step 5: Solve for x
    x = 85,024.76/401.31
  6. Step 6: Final answer
    x = 211.87

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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.