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Finding the Fourth Proportional to 662.87, 994.54 and 320.63

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Solution

The fourth proportional to 662.87, 994.54 and 320.63 is: 481.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.87 : 994.54 = 320.63 : x
  2. Step 2: Convert to fraction form
    662.87/994.54 = 320.63/x
  3. Step 3: Cross multiply
    662.87x = 994.54 × 320.63
  4. Step 4: Simplify right side
    662.87x = 318,873.59
  5. Step 5: Solve for x
    x = 318,873.59/662.87
  6. Step 6: Final answer
    x = 481.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.