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Finding the Fourth Proportional to 2,800.76, 3,865.56 and 1,621.94

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Solution

The fourth proportional to 2,800.76, 3,865.56 and 1,621.94 is: 2,238.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,800.76 : 3,865.56 = 1,621.94 : x
  2. Step 2: Convert to fraction form
    2,800.76/3,865.56 = 1,621.94/x
  3. Step 3: Cross multiply
    2,800.76x = 3,865.56 × 1,621.94
  4. Step 4: Simplify right side
    2,800.76x = 6,269,706.39
  5. Step 5: Solve for x
    x = 6,269,706.39/2,800.76
  6. Step 6: Final answer
    x = 2,238.57

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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.