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Finding the Fourth Proportional to 329,878.80, 494,818.20 and 211,780.80

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Solution

The fourth proportional to 329,878.80, 494,818.20 and 211,780.80 is: 317,671.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    329,878.80 : 494,818.20 = 211,780.80 : x
  2. Step 2: Convert to fraction form
    329,878.80/494,818.20 = 211,780.80/x
  3. Step 3: Cross multiply
    329,878.80x = 494,818.20 × 211,780.80
  4. Step 4: Simplify right side
    329,878.80x = 104,792,994,250.56
  5. Step 5: Solve for x
    x = 104,792,994,250.56/329,878.80
  6. Step 6: Final answer
    x = 317,671.20

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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.