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Finding the Fourth Proportional to 321.11, 483.67 and 298.58

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Solution

The fourth proportional to 321.11, 483.67 and 298.58 is: 449.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.11 : 483.67 = 298.58 : x
  2. Step 2: Convert to fraction form
    321.11/483.67 = 298.58/x
  3. Step 3: Cross multiply
    321.11x = 483.67 × 298.58
  4. Step 4: Simplify right side
    321.11x = 144,412.70
  5. Step 5: Solve for x
    x = 144,412.70/321.11
  6. Step 6: Final answer
    x = 449.73

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.