Home / 1,280.85-1,912.64-1,273.17

Finding the Fourth Proportional to 1,280.85, 1,912.64 and 1,273.17

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Solution

The fourth proportional to 1,280.85, 1,912.64 and 1,273.17 is: 1,901.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280.85 : 1,912.64 = 1,273.17 : x
  2. Step 2: Convert to fraction form
    1,280.85/1,912.64 = 1,273.17/x
  3. Step 3: Cross multiply
    1,280.85x = 1,912.64 × 1,273.17
  4. Step 4: Simplify right side
    1,280.85x = 2,435,109.50
  5. Step 5: Solve for x
    x = 2,435,109.50/1,280.85
  6. Step 6: Final answer
    x = 1,901.17

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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.