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Finding the Fourth Proportional to 764,409.60, 1,145,037.60 and 447,907.20

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Solution

The fourth proportional to 764,409.60, 1,145,037.60 and 447,907.20 is: 670,936.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,409.60 : 1,145,037.60 = 447,907.20 : x
  2. Step 2: Convert to fraction form
    764,409.60/1,145,037.60 = 447,907.20/x
  3. Step 3: Cross multiply
    764,409.60x = 1,145,037.60 × 447,907.20
  4. Step 4: Simplify right side
    764,409.60x = 512,870,585,310.72
  5. Step 5: Solve for x
    x = 512,870,585,310.72/764,409.60
  6. Step 6: Final answer
    x = 670,936.87

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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.