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Finding the Fourth Proportional to 3,870.64, 5,801.91 and 2,019.79

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Solution

The fourth proportional to 3,870.64, 5,801.91 and 2,019.79 is: 3,027.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,870.64 : 5,801.91 = 2,019.79 : x
  2. Step 2: Convert to fraction form
    3,870.64/5,801.91 = 2,019.79/x
  3. Step 3: Cross multiply
    3,870.64x = 5,801.91 × 2,019.79
  4. Step 4: Simplify right side
    3,870.64x = 11,718,639.80
  5. Step 5: Solve for x
    x = 11,718,639.80/3,870.64
  6. Step 6: Final answer
    x = 3,027.57

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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.