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Finding the Third Proportional to 145,690 and 311,638

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Solution

The third proportional to 145,690 and 311,638 is: 666,608.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,690 : 311,638 = 311,638 : x
  2. Step 2: Convert to fraction form
    145,690/311,638 = 311,638/x
  3. Step 3: Cross multiply
    145,690x = 311,638 × 311,638
  4. Step 4: Simplify right side
    145,690x = 97,118,243,044
  5. Step 5: Solve for x
    x = 97,118,243,044/145,690
  6. Step 6: Final answer
    x = 666,608.85

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.