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Finding the Fourth Proportional to 326,287.60, 489,609.72 and 126,615.84

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Solution

The fourth proportional to 326,287.60, 489,609.72 and 126,615.84 is: 189,992.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,287.60 : 489,609.72 = 126,615.84 : x
  2. Step 2: Convert to fraction form
    326,287.60/489,609.72 = 126,615.84/x
  3. Step 3: Cross multiply
    326,287.60x = 489,609.72 × 126,615.84
  4. Step 4: Simplify right side
    326,287.60x = 61,992,345,969.96
  5. Step 5: Solve for x
    x = 61,992,345,969.96/326,287.60
  6. Step 6: Final answer
    x = 189,992.96

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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.