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Finding the Fourth Proportional to 1,266.72, 1,900.08 and 779.94

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Solution

The fourth proportional to 1,266.72, 1,900.08 and 779.94 is: 1,169.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,266.72 : 1,900.08 = 779.94 : x
  2. Step 2: Convert to fraction form
    1,266.72/1,900.08 = 779.94/x
  3. Step 3: Cross multiply
    1,266.72x = 1,900.08 × 779.94
  4. Step 4: Simplify right side
    1,266.72x = 1,481,948.40
  5. Step 5: Solve for x
    x = 1,481,948.40/1,266.72
  6. Step 6: Final answer
    x = 1,169.91

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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.