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Finding the Fourth Proportional to 330,708, 496,062 and 81,390

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Solution

The fourth proportional to 330,708, 496,062 and 81,390 is: 122,085

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,708 : 496,062 = 81,390 : x
  2. Step 2: Convert to fraction form
    330,708/496,062 = 81,390/x
  3. Step 3: Cross multiply
    330,708x = 496,062 × 81,390
  4. Step 4: Simplify right side
    330,708x = 40,374,486,180
  5. Step 5: Solve for x
    x = 40,374,486,180/330,708
  6. Step 6: Final answer
    x = 122,085

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