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Finding the Third Proportional to 318,924 and 489,361.50

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Solution

The third proportional to 318,924 and 489,361.50 is: 750,883.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,924 : 489,361.50 = 489,361.50 : x
  2. Step 2: Convert to fraction form
    318,924/489,361.50 = 489,361.50/x
  3. Step 3: Cross multiply
    318,924x = 489,361.50 × 489,361.50
  4. Step 4: Simplify right side
    318,924x = 239,474,677,682.25
  5. Step 5: Solve for x
    x = 239,474,677,682.25/318,924
  6. Step 6: Final answer
    x = 750,883.21

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.