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Finding the Fourth Proportional to 550.59, 826.01 and 388.59

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Solution

The fourth proportional to 550.59, 826.01 and 388.59 is: 582.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    550.59 : 826.01 = 388.59 : x
  2. Step 2: Convert to fraction form
    550.59/826.01 = 388.59/x
  3. Step 3: Cross multiply
    550.59x = 826.01 × 388.59
  4. Step 4: Simplify right side
    550.59x = 320,979.23
  5. Step 5: Solve for x
    x = 320,979.23/550.59
  6. Step 6: Final answer
    x = 582.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.