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Finding the Fourth Proportional to 605.39, 835.40 and 343.40

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Solution

The fourth proportional to 605.39, 835.40 and 343.40 is: 473.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.39 : 835.40 = 343.40 : x
  2. Step 2: Convert to fraction form
    605.39/835.40 = 343.40/x
  3. Step 3: Cross multiply
    605.39x = 835.40 × 343.40
  4. Step 4: Simplify right side
    605.39x = 286,873.04
  5. Step 5: Solve for x
    x = 286,873.04/605.39
  6. Step 6: Final answer
    x = 473.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.