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Finding the Fourth Proportional to 872,310.20, 1,308,465.30 and 809,324.60

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Solution

The fourth proportional to 872,310.20, 1,308,465.30 and 809,324.60 is: 1,213,986.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    872,310.20 : 1,308,465.30 = 809,324.60 : x
  2. Step 2: Convert to fraction form
    872,310.20/1,308,465.30 = 809,324.60/x
  3. Step 3: Cross multiply
    872,310.20x = 1,308,465.30 × 809,324.60
  4. Step 4: Simplify right side
    872,310.20x = 1,058,973,155,536.38
  5. Step 5: Solve for x
    x = 1,058,973,155,536.38/872,310.20
  6. Step 6: Final answer
    x = 1,213,986.90

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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.