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Finding the Fourth Proportional to 798,800.80, 1,198,201.20 and 770,807.20

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Solution

The fourth proportional to 798,800.80, 1,198,201.20 and 770,807.20 is: 1,156,210.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    798,800.80 : 1,198,201.20 = 770,807.20 : x
  2. Step 2: Convert to fraction form
    798,800.80/1,198,201.20 = 770,807.20/x
  3. Step 3: Cross multiply
    798,800.80x = 1,198,201.20 × 770,807.20
  4. Step 4: Simplify right side
    798,800.80x = 923,582,112,008.64
  5. Step 5: Solve for x
    x = 923,582,112,008.64/798,800.80
  6. Step 6: Final answer
    x = 1,156,210.80

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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.