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Finding the Third Proportional to 1,890 and 4,914

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Solution

The third proportional to 1,890 and 4,914 is: 12,776.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,890 : 4,914 = 4,914 : x
  2. Step 2: Convert to fraction form
    1,890/4,914 = 4,914/x
  3. Step 3: Cross multiply
    1,890x = 4,914 × 4,914
  4. Step 4: Simplify right side
    1,890x = 24,147,396
  5. Step 5: Solve for x
    x = 24,147,396/1,890
  6. Step 6: Final answer
    x = 12,776.40

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Why These Related Problems?

These problems maintain the same ratio (2.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.