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Finding the Fourth Proportional to 339, 468.62 and 308.64

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Solution

The fourth proportional to 339, 468.62 and 308.64 is: 426.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    339 : 468.62 = 308.64 : x
  2. Step 2: Convert to fraction form
    339/468.62 = 308.64/x
  3. Step 3: Cross multiply
    339x = 468.62 × 308.64
  4. Step 4: Simplify right side
    339x = 144,634.88
  5. Step 5: Solve for x
    x = 144,634.88/339
  6. Step 6: Final answer
    x = 426.65

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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.