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Finding the Fourth Proportional to 328.92, 454.07 and 212.55

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Solution

The fourth proportional to 328.92, 454.07 and 212.55 is: 293.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    328.92 : 454.07 = 212.55 : x
  2. Step 2: Convert to fraction form
    328.92/454.07 = 212.55/x
  3. Step 3: Cross multiply
    328.92x = 454.07 × 212.55
  4. Step 4: Simplify right side
    328.92x = 96,512.58
  5. Step 5: Solve for x
    x = 96,512.58/328.92
  6. Step 6: Final answer
    x = 293.42

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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.