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Finding the Third Proportional to 989.44 and 2,140.88

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Solution

The third proportional to 989.44 and 2,140.88 is: 4,632.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    989.44 : 2,140.88 = 2,140.88 : x
  2. Step 2: Convert to fraction form
    989.44/2,140.88 = 2,140.88/x
  3. Step 3: Cross multiply
    989.44x = 2,140.88 × 2,140.88
  4. Step 4: Simplify right side
    989.44x = 4,583,345.77
  5. Step 5: Solve for x
    x = 4,583,345.77/989.44
  6. Step 6: Final answer
    x = 4,632.27

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.