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Finding the Fourth Proportional to 605.39, 835.25 and 418.66

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Solution

The fourth proportional to 605.39, 835.25 and 418.66 is: 577.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.39 : 835.25 = 418.66 : x
  2. Step 2: Convert to fraction form
    605.39/835.25 = 418.66/x
  3. Step 3: Cross multiply
    605.39x = 835.25 × 418.66
  4. Step 4: Simplify right side
    605.39x = 349,685.77
  5. Step 5: Solve for x
    x = 349,685.77/605.39
  6. Step 6: Final answer
    x = 577.62

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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.