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Finding the Third Proportional to 655,438.50 and 989,165.25

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Solution

The third proportional to 655,438.50 and 989,165.25 is: 1,492,814.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,438.50 : 989,165.25 = 989,165.25 : x
  2. Step 2: Convert to fraction form
    655,438.50/989,165.25 = 989,165.25/x
  3. Step 3: Cross multiply
    655,438.50x = 989,165.25 × 989,165.25
  4. Step 4: Simplify right side
    655,438.50x = 978,447,891,807.56
  5. Step 5: Solve for x
    x = 978,447,891,807.56/655,438.50
  6. Step 6: Final answer
    x = 1,492,814.19

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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.