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Finding the Fourth Proportional to 401.16, 601.81 and 127.28

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Solution

The fourth proportional to 401.16, 601.81 and 127.28 is: 190.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.16 : 601.81 = 127.28 : x
  2. Step 2: Convert to fraction form
    401.16/601.81 = 127.28/x
  3. Step 3: Cross multiply
    401.16x = 601.81 × 127.28
  4. Step 4: Simplify right side
    401.16x = 76,598.38
  5. Step 5: Solve for x
    x = 76,598.38/401.16
  6. Step 6: Final answer
    x = 190.94

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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.