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Finding the Third Proportional to 520,425 and 780,637.50

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Solution

The third proportional to 520,425 and 780,637.50 is: 1,170,956.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,425 : 780,637.50 = 780,637.50 : x
  2. Step 2: Convert to fraction form
    520,425/780,637.50 = 780,637.50/x
  3. Step 3: Cross multiply
    520,425x = 780,637.50 × 780,637.50
  4. Step 4: Simplify right side
    520,425x = 609,394,906,406.25
  5. Step 5: Solve for x
    x = 609,394,906,406.25/520,425
  6. Step 6: Final answer
    x = 1,170,956.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.