Home / 1,868.49-2,578.58-1,122.78

Finding the Fourth Proportional to 1,868.49, 2,578.58 and 1,122.78

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Solution

The fourth proportional to 1,868.49, 2,578.58 and 1,122.78 is: 1,549.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,868.49 : 2,578.58 = 1,122.78 : x
  2. Step 2: Convert to fraction form
    1,868.49/2,578.58 = 1,122.78/x
  3. Step 3: Cross multiply
    1,868.49x = 2,578.58 × 1,122.78
  4. Step 4: Simplify right side
    1,868.49x = 2,895,172.44
  5. Step 5: Solve for x
    x = 2,895,172.44/1,868.49
  6. Step 6: Final answer
    x = 1,549.47

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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.