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Finding the Fourth Proportional to 351.51, 485.04 and 194.15

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Solution

The fourth proportional to 351.51, 485.04 and 194.15 is: 267.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.51 : 485.04 = 194.15 : x
  2. Step 2: Convert to fraction form
    351.51/485.04 = 194.15/x
  3. Step 3: Cross multiply
    351.51x = 485.04 × 194.15
  4. Step 4: Simplify right side
    351.51x = 94,168.09
  5. Step 5: Solve for x
    x = 94,168.09/351.51
  6. Step 6: Final answer
    x = 267.90

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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.