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Finding the Third Proportional to 655,620 and 1,430,391

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Solution

The third proportional to 655,620 and 1,430,391 is: 3,120,738.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    655,620 : 1,430,391 = 1,430,391 : x
  2. Step 2: Convert to fraction form
    655,620/1,430,391 = 1,430,391/x
  3. Step 3: Cross multiply
    655,620x = 1,430,391 × 1,430,391
  4. Step 4: Simplify right side
    655,620x = 2,046,018,412,881
  5. Step 5: Solve for x
    x = 2,046,018,412,881/655,620
  6. Step 6: Final answer
    x = 3,120,738.25

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.