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Finding the Fourth Proportional to 3,578.76, 5,368.11 and 2,857.05

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Solution

The fourth proportional to 3,578.76, 5,368.11 and 2,857.05 is: 4,285.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,578.76 : 5,368.11 = 2,857.05 : x
  2. Step 2: Convert to fraction form
    3,578.76/5,368.11 = 2,857.05/x
  3. Step 3: Cross multiply
    3,578.76x = 5,368.11 × 2,857.05
  4. Step 4: Simplify right side
    3,578.76x = 15,336,958.68
  5. Step 5: Solve for x
    x = 15,336,958.68/3,578.76
  6. Step 6: Final answer
    x = 4,285.55

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1.5x scale

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.