Home / 3,620.66-5,431.43-1,280.18

Finding the Fourth Proportional to 3,620.66, 5,431.43 and 1,280.18

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Solution

The fourth proportional to 3,620.66, 5,431.43 and 1,280.18 is: 1,920.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,620.66 : 5,431.43 = 1,280.18 : x
  2. Step 2: Convert to fraction form
    3,620.66/5,431.43 = 1,280.18/x
  3. Step 3: Cross multiply
    3,620.66x = 5,431.43 × 1,280.18
  4. Step 4: Simplify right side
    3,620.66x = 6,953,204.47
  5. Step 5: Solve for x
    x = 6,953,204.47/3,620.66
  6. Step 6: Final answer
    x = 1,920.43

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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.