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Finding the Third Proportional to 201,987 and 312,570

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Solution

The third proportional to 201,987 and 312,570 is: 483,694.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,987 : 312,570 = 312,570 : x
  2. Step 2: Convert to fraction form
    201,987/312,570 = 312,570/x
  3. Step 3: Cross multiply
    201,987x = 312,570 × 312,570
  4. Step 4: Simplify right side
    201,987x = 97,700,004,900
  5. Step 5: Solve for x
    x = 97,700,004,900/201,987
  6. Step 6: Final answer
    x = 483,694.52

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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.