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Finding the Fourth Proportional to 603.91, 832.68 and 393.79

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Solution

The fourth proportional to 603.91, 832.68 and 393.79 is: 542.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    603.91 : 832.68 = 393.79 : x
  2. Step 2: Convert to fraction form
    603.91/832.68 = 393.79/x
  3. Step 3: Cross multiply
    603.91x = 832.68 × 393.79
  4. Step 4: Simplify right side
    603.91x = 327,896.89
  5. Step 5: Solve for x
    x = 327,896.89/603.91
  6. Step 6: Final answer
    x = 542.96

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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.