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Finding the Fourth Proportional to 621.36, 850.95 and 613.26

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Solution

The fourth proportional to 621.36, 850.95 and 613.26 is: 839.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.36 : 850.95 = 613.26 : x
  2. Step 2: Convert to fraction form
    621.36/850.95 = 613.26/x
  3. Step 3: Cross multiply
    621.36x = 850.95 × 613.26
  4. Step 4: Simplify right side
    621.36x = 521,853.60
  5. Step 5: Solve for x
    x = 521,853.60/621.36
  6. Step 6: Final answer
    x = 839.86

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.