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Finding the Fourth Proportional to 326,673.09, 489,905.91 and 105,005.25

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Solution

The fourth proportional to 326,673.09, 489,905.91 and 105,005.25 is: 157,474.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,673.09 : 489,905.91 = 105,005.25 : x
  2. Step 2: Convert to fraction form
    326,673.09/489,905.91 = 105,005.25/x
  3. Step 3: Cross multiply
    326,673.09x = 489,905.91 × 105,005.25
  4. Step 4: Simplify right side
    326,673.09x = 51,442,692,556.03
  5. Step 5: Solve for x
    x = 51,442,692,556.03/326,673.09
  6. Step 6: Final answer
    x = 157,474.53

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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.