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Finding the Third Proportional to 393,579 and 618,748.88

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Solution

The third proportional to 393,579 and 618,748.88 is: 972,740.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,579 : 618,748.88 = 618,748.88 : x
  2. Step 2: Convert to fraction form
    393,579/618,748.88 = 618,748.88/x
  3. Step 3: Cross multiply
    393,579x = 618,748.88 × 618,748.88
  4. Step 4: Simplify right side
    393,579x = 382,850,170,313.77
  5. Step 5: Solve for x
    x = 382,850,170,313.77/393,579
  6. Step 6: Final answer
    x = 972,740.34

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Why These Related Problems?

These problems maintain the same ratio (1.57) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.