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Finding the Third Proportional to 433,440 and 690,295

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Solution

The third proportional to 433,440 and 690,295 is: 1,099,361.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    433,440 : 690,295 = 690,295 : x
  2. Step 2: Convert to fraction form
    433,440/690,295 = 690,295/x
  3. Step 3: Cross multiply
    433,440x = 690,295 × 690,295
  4. Step 4: Simplify right side
    433,440x = 476,507,187,025
  5. Step 5: Solve for x
    x = 476,507,187,025/433,440
  6. Step 6: Final answer
    x = 1,099,361.36

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.