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Finding the Fourth Proportional to 446.42, 615.39 and 321.86

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Solution

The fourth proportional to 446.42, 615.39 and 321.86 is: 443.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    446.42 : 615.39 = 321.86 : x
  2. Step 2: Convert to fraction form
    446.42/615.39 = 321.86/x
  3. Step 3: Cross multiply
    446.42x = 615.39 × 321.86
  4. Step 4: Simplify right side
    446.42x = 198,069.43
  5. Step 5: Solve for x
    x = 198,069.43/446.42
  6. Step 6: Final answer
    x = 443.68

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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.