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Finding the Fourth Proportional to 368.65, 552.81 and 163.21

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Solution

The fourth proportional to 368.65, 552.81 and 163.21 is: 244.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.65 : 552.81 = 163.21 : x
  2. Step 2: Convert to fraction form
    368.65/552.81 = 163.21/x
  3. Step 3: Cross multiply
    368.65x = 552.81 × 163.21
  4. Step 4: Simplify right side
    368.65x = 90,224.12
  5. Step 5: Solve for x
    x = 90,224.12/368.65
  6. Step 6: Final answer
    x = 244.74

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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.