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Finding the Third Proportional to 842.91 and 2,130.05

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Solution

The third proportional to 842.91 and 2,130.05 is: 5,382.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    842.91 : 2,130.05 = 2,130.05 : x
  2. Step 2: Convert to fraction form
    842.91/2,130.05 = 2,130.05/x
  3. Step 3: Cross multiply
    842.91x = 2,130.05 × 2,130.05
  4. Step 4: Simplify right side
    842.91x = 4,537,099.69
  5. Step 5: Solve for x
    x = 4,537,099.69/842.91
  6. Step 6: Final answer
    x = 5,382.69

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Why These Related Problems?

These problems maintain the same ratio (2.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.