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Finding the Fourth Proportional to 764,563,952.80, 1,147,293,826.80 and 279,938,749.60

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Solution

The fourth proportional to 764,563,952.80, 1,147,293,826.80 and 279,938,749.60 is: 420,072,118.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,563,952.80 : 1,147,293,826.80 = 279,938,749.60 : x
  2. Step 2: Convert to fraction form
    764,563,952.80/1,147,293,826.80 = 279,938,749.60/x
  3. Step 3: Cross multiply
    764,563,952.80x = 1,147,293,826.80 × 279,938,749.60
  4. Step 4: Simplify right side
    764,563,952.80x = 321,171,999,298,190,976
  5. Step 5: Solve for x
    x = 321,171,999,298,190,976/764,563,952.80
  6. Step 6: Final answer
    x = 420,072,118.39

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1.5x scale

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.