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Finding the Third Proportional to 200,308 and 311,946

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Solution

The third proportional to 200,308 and 311,946 is: 485,803.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,308 : 311,946 = 311,946 : x
  2. Step 2: Convert to fraction form
    200,308/311,946 = 311,946/x
  3. Step 3: Cross multiply
    200,308x = 311,946 × 311,946
  4. Step 4: Simplify right side
    200,308x = 97,310,306,916
  5. Step 5: Solve for x
    x = 97,310,306,916/200,308
  6. Step 6: Final answer
    x = 485,803.40

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.