Home / 1,280.77-1,921.83-550.15

Finding the Fourth Proportional to 1,280.77, 1,921.83 and 550.15

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Solution

The fourth proportional to 1,280.77, 1,921.83 and 550.15 is: 825.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280.77 : 1,921.83 = 550.15 : x
  2. Step 2: Convert to fraction form
    1,280.77/1,921.83 = 550.15/x
  3. Step 3: Cross multiply
    1,280.77x = 1,921.83 × 550.15
  4. Step 4: Simplify right side
    1,280.77x = 1,057,294.77
  5. Step 5: Solve for x
    x = 1,057,294.77/1,280.77
  6. Step 6: Final answer
    x = 825.51

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1.5x scale

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.