Home / 1,280.75-1,922.56-1,215.95

Finding the Fourth Proportional to 1,280.75, 1,922.56 and 1,215.95

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Solution

The fourth proportional to 1,280.75, 1,922.56 and 1,215.95 is: 1,825.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280.75 : 1,922.56 = 1,215.95 : x
  2. Step 2: Convert to fraction form
    1,280.75/1,922.56 = 1,215.95/x
  3. Step 3: Cross multiply
    1,280.75x = 1,922.56 × 1,215.95
  4. Step 4: Simplify right side
    1,280.75x = 2,337,724.18
  5. Step 5: Solve for x
    x = 2,337,724.18/1,280.75
  6. Step 6: Final answer
    x = 1,825.28

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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.