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Finding the Fourth Proportional to 2,069.21, 3,103.85 and 608.51

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Solution

The fourth proportional to 2,069.21, 3,103.85 and 608.51 is: 912.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,069.21 : 3,103.85 = 608.51 : x
  2. Step 2: Convert to fraction form
    2,069.21/3,103.85 = 608.51/x
  3. Step 3: Cross multiply
    2,069.21x = 3,103.85 × 608.51
  4. Step 4: Simplify right side
    2,069.21x = 1,888,733.04
  5. Step 5: Solve for x
    x = 1,888,733.04/2,069.21
  6. Step 6: Final answer
    x = 912.78

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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.