Home / 3,211.25-4,812.12-2,772.50

Finding the Fourth Proportional to 3,211.25, 4,812.12 and 2,772.50

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Solution

The fourth proportional to 3,211.25, 4,812.12 and 2,772.50 is: 4,154.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,211.25 : 4,812.12 = 2,772.50 : x
  2. Step 2: Convert to fraction form
    3,211.25/4,812.12 = 2,772.50/x
  3. Step 3: Cross multiply
    3,211.25x = 4,812.12 × 2,772.50
  4. Step 4: Simplify right side
    3,211.25x = 13,341,578.64
  5. Step 5: Solve for x
    x = 13,341,578.64/3,211.25
  6. Step 6: Final answer
    x = 4,154.64

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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.