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Finding the Fourth Proportional to 326,072.40, 489,084.30 and 136,483.80

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Solution

The fourth proportional to 326,072.40, 489,084.30 and 136,483.80 is: 204,715.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,072.40 : 489,084.30 = 136,483.80 : x
  2. Step 2: Convert to fraction form
    326,072.40/489,084.30 = 136,483.80/x
  3. Step 3: Cross multiply
    326,072.40x = 489,084.30 × 136,483.80
  4. Step 4: Simplify right side
    326,072.40x = 66,752,083,784.34
  5. Step 5: Solve for x
    x = 66,752,083,784.34/326,072.40
  6. Step 6: Final answer
    x = 204,715.53

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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.