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Finding the Fourth Proportional to 3,894.92, 5,842.41 and 1,297.86

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Solution

The fourth proportional to 3,894.92, 5,842.41 and 1,297.86 is: 1,946.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,894.92 : 5,842.41 = 1,297.86 : x
  2. Step 2: Convert to fraction form
    3,894.92/5,842.41 = 1,297.86/x
  3. Step 3: Cross multiply
    3,894.92x = 5,842.41 × 1,297.86
  4. Step 4: Simplify right side
    3,894.92x = 7,582,630.24
  5. Step 5: Solve for x
    x = 7,582,630.24/3,894.92
  6. Step 6: Final answer
    x = 1,946.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.