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Finding the Fourth Proportional to 481.40, 664.37 and 284.91

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Solution

The fourth proportional to 481.40, 664.37 and 284.91 is: 393.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.40 : 664.37 = 284.91 : x
  2. Step 2: Convert to fraction form
    481.40/664.37 = 284.91/x
  3. Step 3: Cross multiply
    481.40x = 664.37 × 284.91
  4. Step 4: Simplify right side
    481.40x = 189,285.66
  5. Step 5: Solve for x
    x = 189,285.66/481.40
  6. Step 6: Final answer
    x = 393.20

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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.