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Finding the Fourth Proportional to 613.69, 920.69 and 180.84

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Solution

The fourth proportional to 613.69, 920.69 and 180.84 is: 271.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.69 : 920.69 = 180.84 : x
  2. Step 2: Convert to fraction form
    613.69/920.69 = 180.84/x
  3. Step 3: Cross multiply
    613.69x = 920.69 × 180.84
  4. Step 4: Simplify right side
    613.69x = 166,500.81
  5. Step 5: Solve for x
    x = 166,500.81/613.69
  6. Step 6: Final answer
    x = 271.31

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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.