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Finding the Fourth Proportional to 351.88, 485.38 and 220.93

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Solution

The fourth proportional to 351.88, 485.38 and 220.93 is: 304.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.88 : 485.38 = 220.93 : x
  2. Step 2: Convert to fraction form
    351.88/485.38 = 220.93/x
  3. Step 3: Cross multiply
    351.88x = 485.38 × 220.93
  4. Step 4: Simplify right side
    351.88x = 107,235.00
  5. Step 5: Solve for x
    x = 107,235.00/351.88
  6. Step 6: Final answer
    x = 304.75

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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.