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Finding the Fourth Proportional to 4,939,843.40, 7,409,765.10 and 2,100,048.20

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Solution

The fourth proportional to 4,939,843.40, 7,409,765.10 and 2,100,048.20 is: 3,150,072.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,939,843.40 : 7,409,765.10 = 2,100,048.20 : x
  2. Step 2: Convert to fraction form
    4,939,843.40/7,409,765.10 = 2,100,048.20/x
  3. Step 3: Cross multiply
    4,939,843.40x = 7,409,765.10 × 2,100,048.20
  4. Step 4: Simplify right side
    4,939,843.40x = 15,560,863,860,677.82
  5. Step 5: Solve for x
    x = 15,560,863,860,677.82/4,939,843.40
  6. Step 6: Final answer
    x = 3,150,072.30

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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.