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Finding the Fourth Proportional to 613.21, 919.89 and 202.61

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Solution

The fourth proportional to 613.21, 919.89 and 202.61 is: 303.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.21 : 919.89 = 202.61 : x
  2. Step 2: Convert to fraction form
    613.21/919.89 = 202.61/x
  3. Step 3: Cross multiply
    613.21x = 919.89 × 202.61
  4. Step 4: Simplify right side
    613.21x = 186,378.91
  5. Step 5: Solve for x
    x = 186,378.91/613.21
  6. Step 6: Final answer
    x = 303.94

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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.