Home / 1,383.17-2,074.75-409.20

Finding the Fourth Proportional to 1,383.17, 2,074.75 and 409.20

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Solution

The fourth proportional to 1,383.17, 2,074.75 and 409.20 is: 613.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,383.17 : 2,074.75 = 409.20 : x
  2. Step 2: Convert to fraction form
    1,383.17/2,074.75 = 409.20/x
  3. Step 3: Cross multiply
    1,383.17x = 2,074.75 × 409.20
  4. Step 4: Simplify right side
    1,383.17x = 848,977.33
  5. Step 5: Solve for x
    x = 848,977.33/1,383.17
  6. Step 6: Final answer
    x = 613.79

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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.