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Finding the Fourth Proportional to 326,605.80, 489,939.50 and 126,941.48

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Solution

The fourth proportional to 326,605.80, 489,939.50 and 126,941.48 is: 190,424.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,605.80 : 489,939.50 = 126,941.48 : x
  2. Step 2: Convert to fraction form
    326,605.80/489,939.50 = 126,941.48/x
  3. Step 3: Cross multiply
    326,605.80x = 489,939.50 × 126,941.48
  4. Step 4: Simplify right side
    326,605.80x = 62,193,645,240.46
  5. Step 5: Solve for x
    x = 62,193,645,240.46/326,605.80
  6. Step 6: Final answer
    x = 190,424.19

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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.