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Finding the Fourth Proportional to 382.58, 573.96 and 139.18

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Solution

The fourth proportional to 382.58, 573.96 and 139.18 is: 208.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.58 : 573.96 = 139.18 : x
  2. Step 2: Convert to fraction form
    382.58/573.96 = 139.18/x
  3. Step 3: Cross multiply
    382.58x = 573.96 × 139.18
  4. Step 4: Simplify right side
    382.58x = 79,883.75
  5. Step 5: Solve for x
    x = 79,883.75/382.58
  6. Step 6: Final answer
    x = 208.80

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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.