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Finding the Fourth Proportional to 355.92, 486.90 and 353.88

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Solution

The fourth proportional to 355.92, 486.90 and 353.88 is: 484.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.92 : 486.90 = 353.88 : x
  2. Step 2: Convert to fraction form
    355.92/486.90 = 353.88/x
  3. Step 3: Cross multiply
    355.92x = 486.90 × 353.88
  4. Step 4: Simplify right side
    355.92x = 172,304.17
  5. Step 5: Solve for x
    x = 172,304.17/355.92
  6. Step 6: Final answer
    x = 484.11

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.