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Finding the Fourth Proportional to 346.68, 479.34 and 331.38

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Solution

The fourth proportional to 346.68, 479.34 and 331.38 is: 458.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.68 : 479.34 = 331.38 : x
  2. Step 2: Convert to fraction form
    346.68/479.34 = 331.38/x
  3. Step 3: Cross multiply
    346.68x = 479.34 × 331.38
  4. Step 4: Simplify right side
    346.68x = 158,843.69
  5. Step 5: Solve for x
    x = 158,843.69/346.68
  6. Step 6: Final answer
    x = 458.19

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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.