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Finding the Fourth Proportional to 445.60, 615.25 and 321.53

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Solution

The fourth proportional to 445.60, 615.25 and 321.53 is: 443.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.60 : 615.25 = 321.53 : x
  2. Step 2: Convert to fraction form
    445.60/615.25 = 321.53/x
  3. Step 3: Cross multiply
    445.60x = 615.25 × 321.53
  4. Step 4: Simplify right side
    445.60x = 197,819.72
  5. Step 5: Solve for x
    x = 197,819.72/445.60
  6. Step 6: Final answer
    x = 443.95

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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.