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Finding the Fourth Proportional to 554.12, 764.75 and 330.20

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Solution

The fourth proportional to 554.12, 764.75 and 330.20 is: 455.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.12 : 764.75 = 330.20 : x
  2. Step 2: Convert to fraction form
    554.12/764.75 = 330.20/x
  3. Step 3: Cross multiply
    554.12x = 764.75 × 330.20
  4. Step 4: Simplify right side
    554.12x = 252,514.98
  5. Step 5: Solve for x
    x = 252,514.98/554.12
  6. Step 6: Final answer
    x = 455.71

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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.