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Finding the Fourth Proportional to 351.38, 483.60 and 281.18

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Solution

The fourth proportional to 351.38, 483.60 and 281.18 is: 386.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.38 : 483.60 = 281.18 : x
  2. Step 2: Convert to fraction form
    351.38/483.60 = 281.18/x
  3. Step 3: Cross multiply
    351.38x = 483.60 × 281.18
  4. Step 4: Simplify right side
    351.38x = 135,978.65
  5. Step 5: Solve for x
    x = 135,978.65/351.38
  6. Step 6: Final answer
    x = 386.98

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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.