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Finding the Fourth Proportional to 351.11, 484.63 and 281.65

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Solution

The fourth proportional to 351.11, 484.63 and 281.65 is: 388.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.11 : 484.63 = 281.65 : x
  2. Step 2: Convert to fraction form
    351.11/484.63 = 281.65/x
  3. Step 3: Cross multiply
    351.11x = 484.63 × 281.65
  4. Step 4: Simplify right side
    351.11x = 136,496.04
  5. Step 5: Solve for x
    x = 136,496.04/351.11
  6. Step 6: Final answer
    x = 388.76

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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.