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Finding the Fourth Proportional to 979,672.80, 1,469,163.60 and 447,448.80

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Solution

The fourth proportional to 979,672.80, 1,469,163.60 and 447,448.80 is: 671,015.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    979,672.80 : 1,469,163.60 = 447,448.80 : x
  2. Step 2: Convert to fraction form
    979,672.80/1,469,163.60 = 447,448.80/x
  3. Step 3: Cross multiply
    979,672.80x = 1,469,163.60 × 447,448.80
  4. Step 4: Simplify right side
    979,672.80x = 657,375,489,823.68
  5. Step 5: Solve for x
    x = 657,375,489,823.68/979,672.80
  6. Step 6: Final answer
    x = 671,015.35

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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.