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Finding the Fourth Proportional to 613.43, 919.82 and 369.81

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Solution

The fourth proportional to 613.43, 919.82 and 369.81 is: 554.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.43 : 919.82 = 369.81 : x
  2. Step 2: Convert to fraction form
    613.43/919.82 = 369.81/x
  3. Step 3: Cross multiply
    613.43x = 919.82 × 369.81
  4. Step 4: Simplify right side
    613.43x = 340,156.79
  5. Step 5: Solve for x
    x = 340,156.79/613.43
  6. Step 6: Final answer
    x = 554.52

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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.