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Finding the Fourth Proportional to 481.84, 665.51 and 351.43

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Solution

The fourth proportional to 481.84, 665.51 and 351.43 is: 485.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.84 : 665.51 = 351.43 : x
  2. Step 2: Convert to fraction form
    481.84/665.51 = 351.43/x
  3. Step 3: Cross multiply
    481.84x = 665.51 × 351.43
  4. Step 4: Simplify right side
    481.84x = 233,880.18
  5. Step 5: Solve for x
    x = 233,880.18/481.84
  6. Step 6: Final answer
    x = 485.39

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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.