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Finding the Fourth Proportional to 3,866.69, 5,334.57 and 2,860.80

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Solution

The fourth proportional to 3,866.69, 5,334.57 and 2,860.80 is: 3,946.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,866.69 : 5,334.57 = 2,860.80 : x
  2. Step 2: Convert to fraction form
    3,866.69/5,334.57 = 2,860.80/x
  3. Step 3: Cross multiply
    3,866.69x = 5,334.57 × 2,860.80
  4. Step 4: Simplify right side
    3,866.69x = 15,261,137.86
  5. Step 5: Solve for x
    x = 15,261,137.86/3,866.69
  6. Step 6: Final answer
    x = 3,946.82

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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.