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Finding the Fourth Proportional to 401.44, 601.96 and 279.76

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Solution

The fourth proportional to 401.44, 601.96 and 279.76 is: 419.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.44 : 601.96 = 279.76 : x
  2. Step 2: Convert to fraction form
    401.44/601.96 = 279.76/x
  3. Step 3: Cross multiply
    401.44x = 601.96 × 279.76
  4. Step 4: Simplify right side
    401.44x = 168,404.33
  5. Step 5: Solve for x
    x = 168,404.33/401.44
  6. Step 6: Final answer
    x = 419.50

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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.