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Finding the Fourth Proportional to 326,622.69, 489,743.30 and 126,709.46

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Solution

The fourth proportional to 326,622.69, 489,743.30 and 126,709.46 is: 189,990.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,622.69 : 489,743.30 = 126,709.46 : x
  2. Step 2: Convert to fraction form
    326,622.69/489,743.30 = 126,709.46/x
  3. Step 3: Cross multiply
    326,622.69x = 489,743.30 × 126,709.46
  4. Step 4: Simplify right side
    326,622.69x = 62,055,109,081.62
  5. Step 5: Solve for x
    x = 62,055,109,081.62/326,622.69
  6. Step 6: Final answer
    x = 189,990.20

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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.