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Finding the Fourth Proportional to 3,896.90, 5,848.32 and 2,859.68

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Solution

The fourth proportional to 3,896.90, 5,848.32 and 2,859.68 is: 4,291.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,896.90 : 5,848.32 = 2,859.68 : x
  2. Step 2: Convert to fraction form
    3,896.90/5,848.32 = 2,859.68/x
  3. Step 3: Cross multiply
    3,896.90x = 5,848.32 × 2,859.68
  4. Step 4: Simplify right side
    3,896.90x = 16,724,323.74
  5. Step 5: Solve for x
    x = 16,724,323.74/3,896.90
  6. Step 6: Final answer
    x = 4,291.70

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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.