Home / 2,853.36-4,278.42-1,390.68

Finding the Fourth Proportional to 2,853.36, 4,278.42 and 1,390.68

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Solution

The fourth proportional to 2,853.36, 4,278.42 and 1,390.68 is: 2,085.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,853.36 : 4,278.42 = 1,390.68 : x
  2. Step 2: Convert to fraction form
    2,853.36/4,278.42 = 1,390.68/x
  3. Step 3: Cross multiply
    2,853.36x = 4,278.42 × 1,390.68
  4. Step 4: Simplify right side
    2,853.36x = 5,949,913.13
  5. Step 5: Solve for x
    x = 5,949,913.13/2,853.36
  6. Step 6: Final answer
    x = 2,085.23

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1.5x scale

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.