Home / 2,228.80-3,075.66-1,284.40

Finding the Fourth Proportional to 2,228.80, 3,075.66 and 1,284.40

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Solution

The fourth proportional to 2,228.80, 3,075.66 and 1,284.40 is: 1,772.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,228.80 : 3,075.66 = 1,284.40 : x
  2. Step 2: Convert to fraction form
    2,228.80/3,075.66 = 1,284.40/x
  3. Step 3: Cross multiply
    2,228.80x = 3,075.66 × 1,284.40
  4. Step 4: Simplify right side
    2,228.80x = 3,950,377.70
  5. Step 5: Solve for x
    x = 3,950,377.70/2,228.80
  6. Step 6: Final answer
    x = 1,772.42

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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.