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Finding the Fourth Proportional to 986,512.40, 1,479,768.60 and 809,219.60

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Solution

The fourth proportional to 986,512.40, 1,479,768.60 and 809,219.60 is: 1,213,829.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    986,512.40 : 1,479,768.60 = 809,219.60 : x
  2. Step 2: Convert to fraction form
    986,512.40/1,479,768.60 = 809,219.60/x
  3. Step 3: Cross multiply
    986,512.40x = 1,479,768.60 × 809,219.60
  4. Step 4: Simplify right side
    986,512.40x = 1,197,457,754,584.56
  5. Step 5: Solve for x
    x = 1,197,457,754,584.56/986,512.40
  6. Step 6: Final answer
    x = 1,213,829.40

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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.