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Finding the Fourth Proportional to 330,392.76, 492,092.19 and 328,781.76

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Solution

The fourth proportional to 330,392.76, 492,092.19 and 328,781.76 is: 489,692.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,392.76 : 492,092.19 = 328,781.76 : x
  2. Step 2: Convert to fraction form
    330,392.76/492,092.19 = 328,781.76/x
  3. Step 3: Cross multiply
    330,392.76x = 492,092.19 × 328,781.76
  4. Step 4: Simplify right side
    330,392.76x = 161,790,936,310.45
  5. Step 5: Solve for x
    x = 161,790,936,310.45/330,392.76
  6. Step 6: Final answer
    x = 489,692.74

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.