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Finding the Fourth Proportional to 484.88, 669.12 and 354.44

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Solution

The fourth proportional to 484.88, 669.12 and 354.44 is: 489.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    484.88 : 669.12 = 354.44 : x
  2. Step 2: Convert to fraction form
    484.88/669.12 = 354.44/x
  3. Step 3: Cross multiply
    484.88x = 669.12 × 354.44
  4. Step 4: Simplify right side
    484.88x = 237,162.89
  5. Step 5: Solve for x
    x = 237,162.89/484.88
  6. Step 6: Final answer
    x = 489.12

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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.