Home / 1,928.39-2,672.34-1,891.47

Finding the Fourth Proportional to 1,928.39, 2,672.34 and 1,891.47

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Solution

The fourth proportional to 1,928.39, 2,672.34 and 1,891.47 is: 2,621.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,928.39 : 2,672.34 = 1,891.47 : x
  2. Step 2: Convert to fraction form
    1,928.39/2,672.34 = 1,891.47/x
  3. Step 3: Cross multiply
    1,928.39x = 2,672.34 × 1,891.47
  4. Step 4: Simplify right side
    1,928.39x = 5,054,650.94
  5. Step 5: Solve for x
    x = 5,054,650.94/1,928.39
  6. Step 6: Final answer
    x = 2,621.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.