Home / 1,868.55-2,578.78-1,122.54

Finding the Fourth Proportional to 1,868.55, 2,578.78 and 1,122.54

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Solution

The fourth proportional to 1,868.55, 2,578.78 and 1,122.54 is: 1,549.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,868.55 : 2,578.78 = 1,122.54 : x
  2. Step 2: Convert to fraction form
    1,868.55/2,578.78 = 1,122.54/x
  3. Step 3: Cross multiply
    1,868.55x = 2,578.78 × 1,122.54
  4. Step 4: Simplify right side
    1,868.55x = 2,894,783.70
  5. Step 5: Solve for x
    x = 2,894,783.70/1,868.55
  6. Step 6: Final answer
    x = 1,549.21

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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.