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Finding the Fourth Proportional to 401.44, 552.72 and 354.12

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Solution

The fourth proportional to 401.44, 552.72 and 354.12 is: 487.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.44 : 552.72 = 354.12 : x
  2. Step 2: Convert to fraction form
    401.44/552.72 = 354.12/x
  3. Step 3: Cross multiply
    401.44x = 552.72 × 354.12
  4. Step 4: Simplify right side
    401.44x = 195,729.21
  5. Step 5: Solve for x
    x = 195,729.21/401.44
  6. Step 6: Final answer
    x = 487.57

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.