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Finding the Fourth Proportional to 1,266.44, 1,900.22 and 680.76

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Solution

The fourth proportional to 1,266.44, 1,900.22 and 680.76 is: 1,021.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,266.44 : 1,900.22 = 680.76 : x
  2. Step 2: Convert to fraction form
    1,266.44/1,900.22 = 680.76/x
  3. Step 3: Cross multiply
    1,266.44x = 1,900.22 × 680.76
  4. Step 4: Simplify right side
    1,266.44x = 1,293,590.36
  5. Step 5: Solve for x
    x = 1,293,590.36/1,266.44
  6. Step 6: Final answer
    x = 1,021.44

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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.