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Finding the Fourth Proportional to 993,271.20, 1,489,906.80 and 780,694.80

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Solution

The fourth proportional to 993,271.20, 1,489,906.80 and 780,694.80 is: 1,171,042.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    993,271.20 : 1,489,906.80 = 780,694.80 : x
  2. Step 2: Convert to fraction form
    993,271.20/1,489,906.80 = 780,694.80/x
  3. Step 3: Cross multiply
    993,271.20x = 1,489,906.80 × 780,694.80
  4. Step 4: Simplify right side
    993,271.20x = 1,163,162,491,244.64
  5. Step 5: Solve for x
    x = 1,163,162,491,244.64/993,271.20
  6. Step 6: Final answer
    x = 1,171,042.20

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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.