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Finding the Fourth Proportional to 368.87, 553.40 and 163.48

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Solution

The fourth proportional to 368.87, 553.40 and 163.48 is: 245.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.87 : 553.40 = 163.48 : x
  2. Step 2: Convert to fraction form
    368.87/553.40 = 163.48/x
  3. Step 3: Cross multiply
    368.87x = 553.40 × 163.48
  4. Step 4: Simplify right side
    368.87x = 90,469.83
  5. Step 5: Solve for x
    x = 90,469.83/368.87
  6. Step 6: Final answer
    x = 245.26

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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.