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Finding the Fourth Proportional to 287.50, 396.73 and 163.17

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Solution

The fourth proportional to 287.50, 396.73 and 163.17 is: 225.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    287.50 : 396.73 = 163.17 : x
  2. Step 2: Convert to fraction form
    287.50/396.73 = 163.17/x
  3. Step 3: Cross multiply
    287.50x = 396.73 × 163.17
  4. Step 4: Simplify right side
    287.50x = 64,731.63
  5. Step 5: Solve for x
    x = 64,731.63/287.50
  6. Step 6: Final answer
    x = 225.15

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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.