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Finding the Fourth Proportional to 382.96, 528.49 and 208.30

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Solution

The fourth proportional to 382.96, 528.49 and 208.30 is: 287.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.96 : 528.49 = 208.30 : x
  2. Step 2: Convert to fraction form
    382.96/528.49 = 208.30/x
  3. Step 3: Cross multiply
    382.96x = 528.49 × 208.30
  4. Step 4: Simplify right side
    382.96x = 110,084.47
  5. Step 5: Solve for x
    x = 110,084.47/382.96
  6. Step 6: Final answer
    x = 287.46

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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.