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Finding the Fourth Proportional to 400.89, 601.29 and 140.79

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Solution

The fourth proportional to 400.89, 601.29 and 140.79 is: 211.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.89 : 601.29 = 140.79 : x
  2. Step 2: Convert to fraction form
    400.89/601.29 = 140.79/x
  3. Step 3: Cross multiply
    400.89x = 601.29 × 140.79
  4. Step 4: Simplify right side
    400.89x = 84,655.62
  5. Step 5: Solve for x
    x = 84,655.62/400.89
  6. Step 6: Final answer
    x = 211.17

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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.