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Finding the Fourth Proportional to 2,889.66, 3,981.72 and 2,224.45

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Solution

The fourth proportional to 2,889.66, 3,981.72 and 2,224.45 is: 3,065.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,889.66 : 3,981.72 = 2,224.45 : x
  2. Step 2: Convert to fraction form
    2,889.66/3,981.72 = 2,224.45/x
  3. Step 3: Cross multiply
    2,889.66x = 3,981.72 × 2,224.45
  4. Step 4: Simplify right side
    2,889.66x = 8,857,137.05
  5. Step 5: Solve for x
    x = 8,857,137.05/2,889.66
  6. Step 6: Final answer
    x = 3,065.11

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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.