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Finding the Fourth Proportional to 371.87, 554.52 and 320.84

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Solution

The fourth proportional to 371.87, 554.52 and 320.84 is: 478.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.87 : 554.52 = 320.84 : x
  2. Step 2: Convert to fraction form
    371.87/554.52 = 320.84/x
  3. Step 3: Cross multiply
    371.87x = 554.52 × 320.84
  4. Step 4: Simplify right side
    371.87x = 177,912.20
  5. Step 5: Solve for x
    x = 177,912.20/371.87
  6. Step 6: Final answer
    x = 478.43

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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.