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Finding the Fourth Proportional to 401.10, 601.75 and 127.19

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Solution

The fourth proportional to 401.10, 601.75 and 127.19 is: 190.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.10 : 601.75 = 127.19 : x
  2. Step 2: Convert to fraction form
    401.10/601.75 = 127.19/x
  3. Step 3: Cross multiply
    401.10x = 601.75 × 127.19
  4. Step 4: Simplify right side
    401.10x = 76,538.25
  5. Step 5: Solve for x
    x = 76,538.25/401.10
  6. Step 6: Final answer
    x = 190.82

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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.