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Finding the Fourth Proportional to 382.89, 528.38 and 208.23

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Solution

The fourth proportional to 382.89, 528.38 and 208.23 is: 287.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.89 : 528.38 = 208.23 : x
  2. Step 2: Convert to fraction form
    382.89/528.38 = 208.23/x
  3. Step 3: Cross multiply
    382.89x = 528.38 × 208.23
  4. Step 4: Simplify right side
    382.89x = 110,021.93
  5. Step 5: Solve for x
    x = 110,021.93/382.89
  6. Step 6: Final answer
    x = 287.35

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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.