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Finding the Fourth Proportional to 326,603.80, 489,936.50 and 126,939.48

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Solution

The fourth proportional to 326,603.80, 489,936.50 and 126,939.48 is: 190,421.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,603.80 : 489,936.50 = 126,939.48 : x
  2. Step 2: Convert to fraction form
    326,603.80/489,936.50 = 126,939.48/x
  3. Step 3: Cross multiply
    326,603.80x = 489,936.50 × 126,939.48
  4. Step 4: Simplify right side
    326,603.80x = 62,192,284,543.02
  5. Step 5: Solve for x
    x = 62,192,284,543.02/326,603.80
  6. Step 6: Final answer
    x = 190,421.19

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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.