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Finding the Fourth Proportional to 454.92, 682.56 and 211.60

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Solution

The fourth proportional to 454.92, 682.56 and 211.60 is: 317.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    454.92 : 682.56 = 211.60 : x
  2. Step 2: Convert to fraction form
    454.92/682.56 = 211.60/x
  3. Step 3: Cross multiply
    454.92x = 682.56 × 211.60
  4. Step 4: Simplify right side
    454.92x = 144,429.70
  5. Step 5: Solve for x
    x = 144,429.70/454.92
  6. Step 6: Final answer
    x = 317.48

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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.