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Finding the Fourth Proportional to 371.62, 554.15 and 320.59

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Solution

The fourth proportional to 371.62, 554.15 and 320.59 is: 478.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.62 : 554.15 = 320.59 : x
  2. Step 2: Convert to fraction form
    371.62/554.15 = 320.59/x
  3. Step 3: Cross multiply
    371.62x = 554.15 × 320.59
  4. Step 4: Simplify right side
    371.62x = 177,654.95
  5. Step 5: Solve for x
    x = 177,654.95/371.62
  6. Step 6: Final answer
    x = 478.06

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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.