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Finding the Fourth Proportional to 279,977,905.80, 419,966,858.70 and 279,977,905.80

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Solution

The fourth proportional to 279,977,905.80, 419,966,858.70 and 279,977,905.80 is: 419,966,858.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,977,905.80 : 419,966,858.70 = 279,977,905.80 : x
  2. Step 2: Convert to fraction form
    279,977,905.80/419,966,858.70 = 279,977,905.80/x
  3. Step 3: Cross multiply
    279,977,905.80x = 419,966,858.70 × 279,977,905.80
  4. Step 4: Simplify right side
    279,977,905.80x = 117,581,441,604,230,512
  5. Step 5: Solve for x
    x = 117,581,441,604,230,512/279,977,905.80
  6. Step 6: Final answer
    x = 419,966,858.70

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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.