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Finding the Fourth Proportional to 613.36, 839.99 and 605.26

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Solution

The fourth proportional to 613.36, 839.99 and 605.26 is: 828.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.36 : 839.99 = 605.26 : x
  2. Step 2: Convert to fraction form
    613.36/839.99 = 605.26/x
  3. Step 3: Cross multiply
    613.36x = 839.99 × 605.26
  4. Step 4: Simplify right side
    613.36x = 508,412.35
  5. Step 5: Solve for x
    x = 508,412.35/613.36
  6. Step 6: Final answer
    x = 828.90

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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.