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Finding the Fourth Proportional to 401.39, 601.91 and 154.49

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Solution

The fourth proportional to 401.39, 601.91 and 154.49 is: 231.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.39 : 601.91 = 154.49 : x
  2. Step 2: Convert to fraction form
    401.39/601.91 = 154.49/x
  3. Step 3: Cross multiply
    401.39x = 601.91 × 154.49
  4. Step 4: Simplify right side
    401.39x = 92,988.30
  5. Step 5: Solve for x
    x = 92,988.30/401.39
  6. Step 6: Final answer
    x = 231.67

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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.