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Finding the Fourth Proportional to 876,019.20, 1,311,571.20 and 851,443.20

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Solution

The fourth proportional to 876,019.20, 1,311,571.20 and 851,443.20 is: 1,274,776.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    876,019.20 : 1,311,571.20 = 851,443.20 : x
  2. Step 2: Convert to fraction form
    876,019.20/1,311,571.20 = 851,443.20/x
  3. Step 3: Cross multiply
    876,019.20x = 1,311,571.20 × 851,443.20
  4. Step 4: Simplify right side
    876,019.20x = 1,116,728,379,555.84
  5. Step 5: Solve for x
    x = 1,116,728,379,555.84/876,019.20
  6. Step 6: Final answer
    x = 1,274,776.15

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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.