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Finding the Fourth Proportional to 608.05, 839.09 and 387.23

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Solution

The fourth proportional to 608.05, 839.09 and 387.23 is: 534.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    608.05 : 839.09 = 387.23 : x
  2. Step 2: Convert to fraction form
    608.05/839.09 = 387.23/x
  3. Step 3: Cross multiply
    608.05x = 839.09 × 387.23
  4. Step 4: Simplify right side
    608.05x = 324,917.59
  5. Step 5: Solve for x
    x = 324,917.59/608.05
  6. Step 6: Final answer
    x = 534.36

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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.