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Finding the Fourth Proportional to 371.70, 556.38 and 336.78

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Solution

The fourth proportional to 371.70, 556.38 and 336.78 is: 504.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.70 : 556.38 = 336.78 : x
  2. Step 2: Convert to fraction form
    371.70/556.38 = 336.78/x
  3. Step 3: Cross multiply
    371.70x = 556.38 × 336.78
  4. Step 4: Simplify right side
    371.70x = 187,377.66
  5. Step 5: Solve for x
    x = 187,377.66/371.70
  6. Step 6: Final answer
    x = 504.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.