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Finding the Third Proportional to 1,991.67 and 3,152.67

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Solution

The third proportional to 1,991.67 and 3,152.67 is: 4,990.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,991.67 : 3,152.67 = 3,152.67 : x
  2. Step 2: Convert to fraction form
    1,991.67/3,152.67 = 3,152.67/x
  3. Step 3: Cross multiply
    1,991.67x = 3,152.67 × 3,152.67
  4. Step 4: Simplify right side
    1,991.67x = 9,939,339.95
  5. Step 5: Solve for x
    x = 9,939,339.95/1,991.67
  6. Step 6: Final answer
    x = 4,990.45

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Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.