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Finding the Fourth Proportional to 1,891.05, 2,609.60 and 1,051.79

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Solution

The fourth proportional to 1,891.05, 2,609.60 and 1,051.79 is: 1,451.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,891.05 : 2,609.60 = 1,051.79 : x
  2. Step 2: Convert to fraction form
    1,891.05/2,609.60 = 1,051.79/x
  3. Step 3: Cross multiply
    1,891.05x = 2,609.60 × 1,051.79
  4. Step 4: Simplify right side
    1,891.05x = 2,744,732.88
  5. Step 5: Solve for x
    x = 2,744,732.88/1,891.05
  6. Step 6: Final answer
    x = 1,451.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.