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Finding the Third Proportional to 142,770 and 310,980

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Solution

The third proportional to 142,770 and 310,980 is: 677,373.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,770 : 310,980 = 310,980 : x
  2. Step 2: Convert to fraction form
    142,770/310,980 = 310,980/x
  3. Step 3: Cross multiply
    142,770x = 310,980 × 310,980
  4. Step 4: Simplify right side
    142,770x = 96,708,560,400
  5. Step 5: Solve for x
    x = 96,708,560,400/142,770
  6. Step 6: Final answer
    x = 677,373.12

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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.