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Finding the Fourth Proportional to 285.15, 427.18 and 163.04

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Solution

The fourth proportional to 285.15, 427.18 and 163.04 is: 244.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.15 : 427.18 = 163.04 : x
  2. Step 2: Convert to fraction form
    285.15/427.18 = 163.04/x
  3. Step 3: Cross multiply
    285.15x = 427.18 × 163.04
  4. Step 4: Simplify right side
    285.15x = 69,647.43
  5. Step 5: Solve for x
    x = 69,647.43/285.15
  6. Step 6: Final answer
    x = 244.25

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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.