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Finding the Third Proportional to 142,739 and 310,912

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Solution

The third proportional to 142,739 and 310,912 is: 677,223.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,739 : 310,912 = 310,912 : x
  2. Step 2: Convert to fraction form
    142,739/310,912 = 310,912/x
  3. Step 3: Cross multiply
    142,739x = 310,912 × 310,912
  4. Step 4: Simplify right side
    142,739x = 96,666,271,744
  5. Step 5: Solve for x
    x = 96,666,271,744/142,739
  6. Step 6: Final answer
    x = 677,223.97

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.