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Finding the Fourth Proportional to 325,823.20, 489,172.20 and 208,016.80

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Solution

The fourth proportional to 325,823.20, 489,172.20 and 208,016.80 is: 312,304.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,823.20 : 489,172.20 = 208,016.80 : x
  2. Step 2: Convert to fraction form
    325,823.20/489,172.20 = 208,016.80/x
  3. Step 3: Cross multiply
    325,823.20x = 489,172.20 × 208,016.80
  4. Step 4: Simplify right side
    325,823.20x = 101,756,035,692.96
  5. Step 5: Solve for x
    x = 101,756,035,692.96/325,823.20
  6. Step 6: Final answer
    x = 312,304.45

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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.