Home / 2,578.48-3,860.78-2,121.77

Finding the Fourth Proportional to 2,578.48, 3,860.78 and 2,121.77

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Solution

The fourth proportional to 2,578.48, 3,860.78 and 2,121.77 is: 3,176.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,578.48 : 3,860.78 = 2,121.77 : x
  2. Step 2: Convert to fraction form
    2,578.48/3,860.78 = 2,121.77/x
  3. Step 3: Cross multiply
    2,578.48x = 3,860.78 × 2,121.77
  4. Step 4: Simplify right side
    2,578.48x = 8,191,686.22
  5. Step 5: Solve for x
    x = 8,191,686.22/2,578.48
  6. Step 6: Final answer
    x = 3,176.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.