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Finding the Fourth Proportional to 603.78, 832.94 and 355.12

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Solution

The fourth proportional to 603.78, 832.94 and 355.12 is: 489.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    603.78 : 832.94 = 355.12 : x
  2. Step 2: Convert to fraction form
    603.78/832.94 = 355.12/x
  3. Step 3: Cross multiply
    603.78x = 832.94 × 355.12
  4. Step 4: Simplify right side
    603.78x = 295,793.65
  5. Step 5: Solve for x
    x = 295,793.65/603.78
  6. Step 6: Final answer
    x = 489.90

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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.