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Finding the Fourth Proportional to 382.57, 573.32 and 215.65

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Solution

The fourth proportional to 382.57, 573.32 and 215.65 is: 323.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    382.57 : 573.32 = 215.65 : x
  2. Step 2: Convert to fraction form
    382.57/573.32 = 215.65/x
  3. Step 3: Cross multiply
    382.57x = 573.32 × 215.65
  4. Step 4: Simplify right side
    382.57x = 123,633.95
  5. Step 5: Solve for x
    x = 123,633.95/382.57
  6. Step 6: Final answer
    x = 323.17

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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.