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Finding the Fourth Proportional to 326,600.80, 489,932 and 126,936.47

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Solution

The fourth proportional to 326,600.80, 489,932 and 126,936.47 is: 190,416.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,600.80 : 489,932 = 126,936.47 : x
  2. Step 2: Convert to fraction form
    326,600.80/489,932 = 126,936.47/x
  3. Step 3: Cross multiply
    326,600.80x = 489,932 × 126,936.47
  4. Step 4: Simplify right side
    326,600.80x = 62,190,238,620.04
  5. Step 5: Solve for x
    x = 62,190,238,620.04/326,600.80
  6. Step 6: Final answer
    x = 190,416.68

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1.5x scale

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.