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Finding the Fourth Proportional to 1,273.78, 1,900.89 and 1,266.48

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Solution

The fourth proportional to 1,273.78, 1,900.89 and 1,266.48 is: 1,890.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,273.78 : 1,900.89 = 1,266.48 : x
  2. Step 2: Convert to fraction form
    1,273.78/1,900.89 = 1,266.48/x
  3. Step 3: Cross multiply
    1,273.78x = 1,900.89 × 1,266.48
  4. Step 4: Simplify right side
    1,273.78x = 2,407,439.17
  5. Step 5: Solve for x
    x = 2,407,439.17/1,273.78
  6. Step 6: Final answer
    x = 1,890.00

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.