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Finding the Fourth Proportional to 550.96, 825.52 and 388.30

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Solution

The fourth proportional to 550.96, 825.52 and 388.30 is: 581.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    550.96 : 825.52 = 388.30 : x
  2. Step 2: Convert to fraction form
    550.96/825.52 = 388.30/x
  3. Step 3: Cross multiply
    550.96x = 825.52 × 388.30
  4. Step 4: Simplify right side
    550.96x = 320,549.42
  5. Step 5: Solve for x
    x = 320,549.42/550.96
  6. Step 6: Final answer
    x = 581.80

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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.