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Finding the Fourth Proportional to 445.89, 615.03 and 321.34

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Solution

The fourth proportional to 445.89, 615.03 and 321.34 is: 443.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.89 : 615.03 = 321.34 : x
  2. Step 2: Convert to fraction form
    445.89/615.03 = 321.34/x
  3. Step 3: Cross multiply
    445.89x = 615.03 × 321.34
  4. Step 4: Simplify right side
    445.89x = 197,633.74
  5. Step 5: Solve for x
    x = 197,633.74/445.89
  6. Step 6: Final answer
    x = 443.24

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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.