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Finding the Fourth Proportional to 401.05, 601.62 and 127.12

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Solution

The fourth proportional to 401.05, 601.62 and 127.12 is: 190.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.05 : 601.62 = 127.12 : x
  2. Step 2: Convert to fraction form
    401.05/601.62 = 127.12/x
  3. Step 3: Cross multiply
    401.05x = 601.62 × 127.12
  4. Step 4: Simplify right side
    401.05x = 76,474.93
  5. Step 5: Solve for x
    x = 76,474.93/401.05
  6. Step 6: Final answer
    x = 190.69

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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.