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Finding the Fourth Proportional to 454.72, 681.44 and 211.12

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Solution

The fourth proportional to 454.72, 681.44 and 211.12 is: 316.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.72 : 681.44 = 211.12 : x
  2. Step 2: Convert to fraction form
    454.72/681.44 = 211.12/x
  3. Step 3: Cross multiply
    454.72x = 681.44 × 211.12
  4. Step 4: Simplify right side
    454.72x = 143,865.61
  5. Step 5: Solve for x
    x = 143,865.61/454.72
  6. Step 6: Final answer
    x = 316.38

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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.