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Finding the Fourth Proportional to 326,110.20, 489,238.20 and 126,412.80

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Solution

The fourth proportional to 326,110.20, 489,238.20 and 126,412.80 is: 189,647.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,110.20 : 489,238.20 = 126,412.80 : x
  2. Step 2: Convert to fraction form
    326,110.20/489,238.20 = 126,412.80/x
  3. Step 3: Cross multiply
    326,110.20x = 489,238.20 × 126,412.80
  4. Step 4: Simplify right side
    326,110.20x = 61,845,970,728.96
  5. Step 5: Solve for x
    x = 61,845,970,728.96/326,110.20
  6. Step 6: Final answer
    x = 189,647.46

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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.