Home / 1,378.72-2,054.80-1,367.28

Finding the Fourth Proportional to 1,378.72, 2,054.80 and 1,367.28

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Solution

The fourth proportional to 1,378.72, 2,054.80 and 1,367.28 is: 2,037.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,378.72 : 2,054.80 = 1,367.28 : x
  2. Step 2: Convert to fraction form
    1,378.72/2,054.80 = 1,367.28/x
  3. Step 3: Cross multiply
    1,378.72x = 2,054.80 × 1,367.28
  4. Step 4: Simplify right side
    1,378.72x = 2,809,486.94
  5. Step 5: Solve for x
    x = 2,809,486.94/1,378.72
  6. Step 6: Final answer
    x = 2,037.75

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.