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Finding the Fourth Proportional to 605.13, 835.15 and 339.64

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Solution

The fourth proportional to 605.13, 835.15 and 339.64 is: 468.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    605.13 : 835.15 = 339.64 : x
  2. Step 2: Convert to fraction form
    605.13/835.15 = 339.64/x
  3. Step 3: Cross multiply
    605.13x = 835.15 × 339.64
  4. Step 4: Simplify right side
    605.13x = 283,649.90
  5. Step 5: Solve for x
    x = 283,649.90/605.13
  6. Step 6: Final answer
    x = 468.74

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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.