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Finding the Fourth Proportional to 613.09, 919.64 and 180.24

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Solution

The fourth proportional to 613.09, 919.64 and 180.24 is: 270.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.09 : 919.64 = 180.24 : x
  2. Step 2: Convert to fraction form
    613.09/919.64 = 180.24/x
  3. Step 3: Cross multiply
    613.09x = 919.64 × 180.24
  4. Step 4: Simplify right side
    613.09x = 165,756.36
  5. Step 5: Solve for x
    x = 165,756.36/613.09
  6. Step 6: Final answer
    x = 270.36

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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.