Home / 1,540.78-2,124.43-1,289.27

Finding the Fourth Proportional to 1,540.78, 2,124.43 and 1,289.27

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Solution

The fourth proportional to 1,540.78, 2,124.43 and 1,289.27 is: 1,777.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,540.78 : 2,124.43 = 1,289.27 : x
  2. Step 2: Convert to fraction form
    1,540.78/2,124.43 = 1,289.27/x
  3. Step 3: Cross multiply
    1,540.78x = 2,124.43 × 1,289.27
  4. Step 4: Simplify right side
    1,540.78x = 2,738,965.95
  5. Step 5: Solve for x
    x = 2,738,965.95/1,540.78
  6. Step 6: Final answer
    x = 1,777.65

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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.