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Finding the Fourth Proportional to 321.10, 446.10 and 318.10

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Solution

The fourth proportional to 321.10, 446.10 and 318.10 is: 441.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.10 : 446.10 = 318.10 : x
  2. Step 2: Convert to fraction form
    321.10/446.10 = 318.10/x
  3. Step 3: Cross multiply
    321.10x = 446.10 × 318.10
  4. Step 4: Simplify right side
    321.10x = 141,902.82
  5. Step 5: Solve for x
    x = 141,902.82/321.10
  6. Step 6: Final answer
    x = 441.93

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.