Home / 1,608.68-2,219.80-979.36

Finding the Fourth Proportional to 1,608.68, 2,219.80 and 979.36

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Solution

The fourth proportional to 1,608.68, 2,219.80 and 979.36 is: 1,351.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,608.68 : 2,219.80 = 979.36 : x
  2. Step 2: Convert to fraction form
    1,608.68/2,219.80 = 979.36/x
  3. Step 3: Cross multiply
    1,608.68x = 2,219.80 × 979.36
  4. Step 4: Simplify right side
    1,608.68x = 2,173,983.33
  5. Step 5: Solve for x
    x = 2,173,983.33/1,608.68
  6. Step 6: Final answer
    x = 1,351.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.