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Finding the Fourth Proportional to 481.66, 662.93 and 419.20

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Solution

The fourth proportional to 481.66, 662.93 and 419.20 is: 576.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.66 : 662.93 = 419.20 : x
  2. Step 2: Convert to fraction form
    481.66/662.93 = 419.20/x
  3. Step 3: Cross multiply
    481.66x = 662.93 × 419.20
  4. Step 4: Simplify right side
    481.66x = 277,898.16
  5. Step 5: Solve for x
    x = 277,898.16/481.66
  6. Step 6: Final answer
    x = 576.96

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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.