Home / 1,608.30-2,219.46-979.04

Finding the Fourth Proportional to 1,608.30, 2,219.46 and 979.04

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Solution

The fourth proportional to 1,608.30, 2,219.46 and 979.04 is: 1,351.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,608.30 : 2,219.46 = 979.04 : x
  2. Step 2: Convert to fraction form
    1,608.30/2,219.46 = 979.04/x
  3. Step 3: Cross multiply
    1,608.30x = 2,219.46 × 979.04
  4. Step 4: Simplify right side
    1,608.30x = 2,172,940.12
  5. Step 5: Solve for x
    x = 2,172,940.12/1,608.30
  6. Step 6: Final answer
    x = 1,351.08

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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.