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Finding the Fourth Proportional to 484.39, 721.44 and 454.42

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Solution

The fourth proportional to 484.39, 721.44 and 454.42 is: 676.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.39 : 721.44 = 454.42 : x
  2. Step 2: Convert to fraction form
    484.39/721.44 = 454.42/x
  3. Step 3: Cross multiply
    484.39x = 721.44 × 454.42
  4. Step 4: Simplify right side
    484.39x = 327,836.76
  5. Step 5: Solve for x
    x = 327,836.76/484.39
  6. Step 6: Final answer
    x = 676.80

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.