Home / 1,280.22-1,921.14-550.82

Finding the Fourth Proportional to 1,280.22, 1,921.14 and 550.82

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Solution

The fourth proportional to 1,280.22, 1,921.14 and 550.82 is: 826.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280.22 : 1,921.14 = 550.82 : x
  2. Step 2: Convert to fraction form
    1,280.22/1,921.14 = 550.82/x
  3. Step 3: Cross multiply
    1,280.22x = 1,921.14 × 550.82
  4. Step 4: Simplify right side
    1,280.22x = 1,058,192.73
  5. Step 5: Solve for x
    x = 1,058,192.73/1,280.22
  6. Step 6: Final answer
    x = 826.57

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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.