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Finding the Fourth Proportional to 487.88, 668.44 and 481.81

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Solution

The fourth proportional to 487.88, 668.44 and 481.81 is: 660.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.88 : 668.44 = 481.81 : x
  2. Step 2: Convert to fraction form
    487.88/668.44 = 481.81/x
  3. Step 3: Cross multiply
    487.88x = 668.44 × 481.81
  4. Step 4: Simplify right side
    487.88x = 322,061.08
  5. Step 5: Solve for x
    x = 322,061.08/487.88
  6. Step 6: Final answer
    x = 660.12

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.