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Finding the Fourth Proportional to 371.70, 512.46 and 355.50

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Solution

The fourth proportional to 371.70, 512.46 and 355.50 is: 490.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.70 : 512.46 = 355.50 : x
  2. Step 2: Convert to fraction form
    371.70/512.46 = 355.50/x
  3. Step 3: Cross multiply
    371.70x = 512.46 × 355.50
  4. Step 4: Simplify right side
    371.70x = 182,179.53
  5. Step 5: Solve for x
    x = 182,179.53/371.70
  6. Step 6: Final answer
    x = 490.13

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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.