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Finding the Fourth Proportional to 344.67, 513.57 and 308.31

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Solution

The fourth proportional to 344.67, 513.57 and 308.31 is: 459.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    344.67 : 513.57 = 308.31 : x
  2. Step 2: Convert to fraction form
    344.67/513.57 = 308.31/x
  3. Step 3: Cross multiply
    344.67x = 513.57 × 308.31
  4. Step 4: Simplify right side
    344.67x = 158,338.77
  5. Step 5: Solve for x
    x = 158,338.77/344.67
  6. Step 6: Final answer
    x = 459.39

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.