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Finding the Fourth Proportional to 326,256.40, 489,360.30 and 136,667.80

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Solution

The fourth proportional to 326,256.40, 489,360.30 and 136,667.80 is: 204,991.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,256.40 : 489,360.30 = 136,667.80 : x
  2. Step 2: Convert to fraction form
    326,256.40/489,360.30 = 136,667.80/x
  3. Step 3: Cross multiply
    326,256.40x = 489,360.30 × 136,667.80
  4. Step 4: Simplify right side
    326,256.40x = 66,879,795,608.34
  5. Step 5: Solve for x
    x = 66,879,795,608.34/326,256.40
  6. Step 6: Final answer
    x = 204,991.52

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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.