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Finding the Fourth Proportional to 481.50, 662.76 and 392.64

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Solution

The fourth proportional to 481.50, 662.76 and 392.64 is: 540.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.50 : 662.76 = 392.64 : x
  2. Step 2: Convert to fraction form
    481.50/662.76 = 392.64/x
  3. Step 3: Cross multiply
    481.50x = 662.76 × 392.64
  4. Step 4: Simplify right side
    481.50x = 260,226.09
  5. Step 5: Solve for x
    x = 260,226.09/481.50
  6. Step 6: Final answer
    x = 540.45

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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.