Home / 1,280.54-1,918.70-1,232.56

Finding the Fourth Proportional to 1,280.54, 1,918.70 and 1,232.56

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Solution

The fourth proportional to 1,280.54, 1,918.70 and 1,232.56 is: 1,846.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280.54 : 1,918.70 = 1,232.56 : x
  2. Step 2: Convert to fraction form
    1,280.54/1,918.70 = 1,232.56/x
  3. Step 3: Cross multiply
    1,280.54x = 1,918.70 × 1,232.56
  4. Step 4: Simplify right side
    1,280.54x = 2,364,912.87
  5. Step 5: Solve for x
    x = 2,364,912.87/1,280.54
  6. Step 6: Final answer
    x = 1,846.81

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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.