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Finding the Third Proportional to 657,990 and 991,845

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Solution

The third proportional to 657,990 and 991,845 is: 1,495,093.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,990 : 991,845 = 991,845 : x
  2. Step 2: Convert to fraction form
    657,990/991,845 = 991,845/x
  3. Step 3: Cross multiply
    657,990x = 991,845 × 991,845
  4. Step 4: Simplify right side
    657,990x = 983,756,504,025
  5. Step 5: Solve for x
    x = 983,756,504,025/657,990
  6. Step 6: Final answer
    x = 1,495,093.40

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.