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Finding the Fourth Proportional to 351.86, 485.46 and 247.23

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Solution

The fourth proportional to 351.86, 485.46 and 247.23 is: 341.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.86 : 485.46 = 247.23 : x
  2. Step 2: Convert to fraction form
    351.86/485.46 = 247.23/x
  3. Step 3: Cross multiply
    351.86x = 485.46 × 247.23
  4. Step 4: Simplify right side
    351.86x = 120,020.28
  5. Step 5: Solve for x
    x = 120,020.28/351.86
  6. Step 6: Final answer
    x = 341.11

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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.