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Finding the Fourth Proportional to 400.98, 601.39 and 127.09

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Solution

The fourth proportional to 400.98, 601.39 and 127.09 is: 190.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.98 : 601.39 = 127.09 : x
  2. Step 2: Convert to fraction form
    400.98/601.39 = 127.09/x
  3. Step 3: Cross multiply
    400.98x = 601.39 × 127.09
  4. Step 4: Simplify right side
    400.98x = 76,430.66
  5. Step 5: Solve for x
    x = 76,430.66/400.98
  6. Step 6: Final answer
    x = 190.61

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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.