Home / 1,891.20-2,608.32-1,628.16

Finding the Fourth Proportional to 1,891.20, 2,608.32 and 1,628.16

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Solution

The fourth proportional to 1,891.20, 2,608.32 and 1,628.16 is: 2,245.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,891.20 : 2,608.32 = 1,628.16 : x
  2. Step 2: Convert to fraction form
    1,891.20/2,608.32 = 1,628.16/x
  3. Step 3: Cross multiply
    1,891.20x = 2,608.32 × 1,628.16
  4. Step 4: Simplify right side
    1,891.20x = 4,246,762.29
  5. Step 5: Solve for x
    x = 4,246,762.29/1,891.20
  6. Step 6: Final answer
    x = 2,245.54

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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.