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Finding the Fourth Proportional to 872,309.80, 1,308,464.70 and 809,324.20

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Solution

The fourth proportional to 872,309.80, 1,308,464.70 and 809,324.20 is: 1,213,986.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    872,309.80 : 1,308,464.70 = 809,324.20 : x
  2. Step 2: Convert to fraction form
    872,309.80/1,308,464.70 = 809,324.20/x
  3. Step 3: Cross multiply
    872,309.80x = 1,308,464.70 × 809,324.20
  4. Step 4: Simplify right side
    872,309.80x = 1,058,972,146,555.74
  5. Step 5: Solve for x
    x = 1,058,972,146,555.74/872,309.80
  6. Step 6: Final answer
    x = 1,213,986.30

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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.