Home / 820,211.60-1,230,202.20-259,302.80

Finding the Fourth Proportional to 820,211.60, 1,230,202.20 and 259,302.80

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Solution

The fourth proportional to 820,211.60, 1,230,202.20 and 259,302.80 is: 388,917.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,211.60 : 1,230,202.20 = 259,302.80 : x
  2. Step 2: Convert to fraction form
    820,211.60/1,230,202.20 = 259,302.80/x
  3. Step 3: Cross multiply
    820,211.60x = 1,230,202.20 × 259,302.80
  4. Step 4: Simplify right side
    820,211.60x = 318,994,875,026.16
  5. Step 5: Solve for x
    x = 318,994,875,026.16/820,211.60
  6. Step 6: Final answer
    x = 388,917.78

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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.