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Finding the Third Proportional to 28,431 and 43,740

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Solution

The third proportional to 28,431 and 43,740 is: 67,292.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,431 : 43,740 = 43,740 : x
  2. Step 2: Convert to fraction form
    28,431/43,740 = 43,740/x
  3. Step 3: Cross multiply
    28,431x = 43,740 × 43,740
  4. Step 4: Simplify right side
    28,431x = 1,913,187,600
  5. Step 5: Solve for x
    x = 1,913,187,600/28,431
  6. Step 6: Final answer
    x = 67,292.31

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.