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Finding the Third Proportional to 202,356 and 312,660

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Solution

The third proportional to 202,356 and 312,660 is: 483,090.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,356 : 312,660 = 312,660 : x
  2. Step 2: Convert to fraction form
    202,356/312,660 = 312,660/x
  3. Step 3: Cross multiply
    202,356x = 312,660 × 312,660
  4. Step 4: Simplify right side
    202,356x = 97,756,275,600
  5. Step 5: Solve for x
    x = 97,756,275,600/202,356
  6. Step 6: Final answer
    x = 483,090.57

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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.