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Finding the Fourth Proportional to 613.98, 920.90 and 181.10

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Solution

The fourth proportional to 613.98, 920.90 and 181.10 is: 271.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.98 : 920.90 = 181.10 : x
  2. Step 2: Convert to fraction form
    613.98/920.90 = 181.10/x
  3. Step 3: Cross multiply
    613.98x = 920.90 × 181.10
  4. Step 4: Simplify right side
    613.98x = 166,777.75
  5. Step 5: Solve for x
    x = 166,777.75/613.98
  6. Step 6: Final answer
    x = 271.63

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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.