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Finding the Fourth Proportional to 3,878.68, 5,820.27 and 1,538.89

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Solution

The fourth proportional to 3,878.68, 5,820.27 and 1,538.89 is: 2,309.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,878.68 : 5,820.27 = 1,538.89 : x
  2. Step 2: Convert to fraction form
    3,878.68/5,820.27 = 1,538.89/x
  3. Step 3: Cross multiply
    3,878.68x = 5,820.27 × 1,538.89
  4. Step 4: Simplify right side
    3,878.68x = 8,956,755.30
  5. Step 5: Solve for x
    x = 8,956,755.30/3,878.68
  6. Step 6: Final answer
    x = 2,309.23

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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.