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Finding the Fourth Proportional to 344.40, 513.60 and 308

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Solution

The fourth proportional to 344.40, 513.60 and 308 is: 459.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    344.40 : 513.60 = 308 : x
  2. Step 2: Convert to fraction form
    344.40/513.60 = 308/x
  3. Step 3: Cross multiply
    344.40x = 513.60 × 308
  4. Step 4: Simplify right side
    344.40x = 158,188.80
  5. Step 5: Solve for x
    x = 158,188.80/344.40
  6. Step 6: Final answer
    x = 459.32

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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.