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Finding the Fourth Proportional to 326,617.88, 489,736.15 and 126,704.68

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Solution

The fourth proportional to 326,617.88, 489,736.15 and 126,704.68 is: 189,983.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,617.88 : 489,736.15 = 126,704.68 : x
  2. Step 2: Convert to fraction form
    326,617.88/489,736.15 = 126,704.68/x
  3. Step 3: Cross multiply
    326,617.88x = 489,736.15 × 126,704.68
  4. Step 4: Simplify right side
    326,617.88x = 62,051,862,170.18
  5. Step 5: Solve for x
    x = 62,051,862,170.18/326,617.88
  6. Step 6: Final answer
    x = 189,983.05

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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.