Home / 279,936,728.80-419,905,093.20-211,912,280.80

Finding the Fourth Proportional to 279,936,728.80, 419,905,093.20 and 211,912,280.80

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Solution

The fourth proportional to 279,936,728.80, 419,905,093.20 and 211,912,280.80 is: 317,868,421.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,936,728.80 : 419,905,093.20 = 211,912,280.80 : x
  2. Step 2: Convert to fraction form
    279,936,728.80/419,905,093.20 = 211,912,280.80/x
  3. Step 3: Cross multiply
    279,936,728.80x = 419,905,093.20 × 211,912,280.80
  4. Step 4: Simplify right side
    279,936,728.80x = 88,983,046,019,548,576
  5. Step 5: Solve for x
    x = 88,983,046,019,548,576/279,936,728.80
  6. Step 6: Final answer
    x = 317,868,421.20

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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.