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Finding the Fourth Proportional to 550.51, 825.90 and 388.51

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Solution

The fourth proportional to 550.51, 825.90 and 388.51 is: 582.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    550.51 : 825.90 = 388.51 : x
  2. Step 2: Convert to fraction form
    550.51/825.90 = 388.51/x
  3. Step 3: Cross multiply
    550.51x = 825.90 × 388.51
  4. Step 4: Simplify right side
    550.51x = 320,870.41
  5. Step 5: Solve for x
    x = 320,870.41/550.51
  6. Step 6: Final answer
    x = 582.86

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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.