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Finding the Fourth Proportional to 487.17, 727.96 and 331.81

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Solution

The fourth proportional to 487.17, 727.96 and 331.81 is: 495.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.17 : 727.96 = 331.81 : x
  2. Step 2: Convert to fraction form
    487.17/727.96 = 331.81/x
  3. Step 3: Cross multiply
    487.17x = 727.96 × 331.81
  4. Step 4: Simplify right side
    487.17x = 241,544.41
  5. Step 5: Solve for x
    x = 241,544.41/487.17
  6. Step 6: Final answer
    x = 495.81

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.