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Finding the Fourth Proportional to 3,865.39, 5,798.49 and 1,400.47

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Solution

The fourth proportional to 3,865.39, 5,798.49 and 1,400.47 is: 2,100.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,865.39 : 5,798.49 = 1,400.47 : x
  2. Step 2: Convert to fraction form
    3,865.39/5,798.49 = 1,400.47/x
  3. Step 3: Cross multiply
    3,865.39x = 5,798.49 × 1,400.47
  4. Step 4: Simplify right side
    3,865.39x = 8,120,611.29
  5. Step 5: Solve for x
    x = 8,120,611.29/3,865.39
  6. Step 6: Final answer
    x = 2,100.85

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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.