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Finding the Fourth Proportional to 613.59, 920.31 and 180.75

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Solution

The fourth proportional to 613.59, 920.31 and 180.75 is: 271.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.59 : 920.31 = 180.75 : x
  2. Step 2: Convert to fraction form
    613.59/920.31 = 180.75/x
  3. Step 3: Cross multiply
    613.59x = 920.31 × 180.75
  4. Step 4: Simplify right side
    613.59x = 166,346.03
  5. Step 5: Solve for x
    x = 166,346.03/613.59
  6. Step 6: Final answer
    x = 271.10

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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.