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Finding the Fourth Proportional to 189.98, 285.23 and 181.27

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Solution

The fourth proportional to 189.98, 285.23 and 181.27 is: 272.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.98 : 285.23 = 181.27 : x
  2. Step 2: Convert to fraction form
    189.98/285.23 = 181.27/x
  3. Step 3: Cross multiply
    189.98x = 285.23 × 181.27
  4. Step 4: Simplify right side
    189.98x = 51,702.22
  5. Step 5: Solve for x
    x = 51,702.22/189.98
  6. Step 6: Final answer
    x = 272.15

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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.