Home / 3,618.83-5,429.93-1,280.61

Finding the Fourth Proportional to 3,618.83, 5,429.93 and 1,280.61

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Solution

The fourth proportional to 3,618.83, 5,429.93 and 1,280.61 is: 1,921.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,618.83 : 5,429.93 = 1,280.61 : x
  2. Step 2: Convert to fraction form
    3,618.83/5,429.93 = 1,280.61/x
  3. Step 3: Cross multiply
    3,618.83x = 5,429.93 × 1,280.61
  4. Step 4: Simplify right side
    3,618.83x = 6,953,616.25
  5. Step 5: Solve for x
    x = 6,953,616.25/3,618.83
  6. Step 6: Final answer
    x = 1,921.51

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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.