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Finding the Third Proportional to 4,690 and 7,291

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Solution

The third proportional to 4,690 and 7,291 is: 11,334.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,690 : 7,291 = 7,291 : x
  2. Step 2: Convert to fraction form
    4,690/7,291 = 7,291/x
  3. Step 3: Cross multiply
    4,690x = 7,291 × 7,291
  4. Step 4: Simplify right side
    4,690x = 53,158,681
  5. Step 5: Solve for x
    x = 53,158,681/4,690
  6. Step 6: Final answer
    x = 11,334.47

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.