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Finding the Fourth Proportional to 1,891.40, 2,609.88 and 1,051.94

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Solution

The fourth proportional to 1,891.40, 2,609.88 and 1,051.94 is: 1,451.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,891.40 : 2,609.88 = 1,051.94 : x
  2. Step 2: Convert to fraction form
    1,891.40/2,609.88 = 1,051.94/x
  3. Step 3: Cross multiply
    1,891.40x = 2,609.88 × 1,051.94
  4. Step 4: Simplify right side
    1,891.40x = 2,745,424.12
  5. Step 5: Solve for x
    x = 2,745,424.12/1,891.40
  6. Step 6: Final answer
    x = 1,451.53

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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.