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Finding the Fourth Proportional to 588.50, 811.94 and 339.78

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Solution

The fourth proportional to 588.50, 811.94 and 339.78 is: 468.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    588.50 : 811.94 = 339.78 : x
  2. Step 2: Convert to fraction form
    588.50/811.94 = 339.78/x
  3. Step 3: Cross multiply
    588.50x = 811.94 × 339.78
  4. Step 4: Simplify right side
    588.50x = 275,879.27
  5. Step 5: Solve for x
    x = 275,879.27/588.50
  6. Step 6: Final answer
    x = 468.79

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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.