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Finding the Fourth Proportional to 480.89, 663.74 and 281.81

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Solution

The fourth proportional to 480.89, 663.74 and 281.81 is: 388.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.89 : 663.74 = 281.81 : x
  2. Step 2: Convert to fraction form
    480.89/663.74 = 281.81/x
  3. Step 3: Cross multiply
    480.89x = 663.74 × 281.81
  4. Step 4: Simplify right side
    480.89x = 187,048.57
  5. Step 5: Solve for x
    x = 187,048.57/480.89
  6. Step 6: Final answer
    x = 388.96

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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.