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Finding the Fourth Proportional to 326,369.70, 489,217.74 and 136,940.10

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Solution

The fourth proportional to 326,369.70, 489,217.74 and 136,940.10 is: 205,268.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,369.70 : 489,217.74 = 136,940.10 : x
  2. Step 2: Convert to fraction form
    326,369.70/489,217.74 = 136,940.10/x
  3. Step 3: Cross multiply
    326,369.70x = 489,217.74 × 136,940.10
  4. Step 4: Simplify right side
    326,369.70x = 66,993,526,237.37
  5. Step 5: Solve for x
    x = 66,993,526,237.37/326,369.70
  6. Step 6: Final answer
    x = 205,268.83

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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.