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Finding the Fourth Proportional to 344.68, 512.81 and 331.32

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Solution

The fourth proportional to 344.68, 512.81 and 331.32 is: 492.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    344.68 : 512.81 = 331.32 : x
  2. Step 2: Convert to fraction form
    344.68/512.81 = 331.32/x
  3. Step 3: Cross multiply
    344.68x = 512.81 × 331.32
  4. Step 4: Simplify right side
    344.68x = 169,900.46
  5. Step 5: Solve for x
    x = 169,900.46/344.68
  6. Step 6: Final answer
    x = 492.92

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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.