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Finding the Fourth Proportional to 872,308.20, 1,308,462.30 and 809,322.60

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Solution

The fourth proportional to 872,308.20, 1,308,462.30 and 809,322.60 is: 1,213,983.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    872,308.20 : 1,308,462.30 = 809,322.60 : x
  2. Step 2: Convert to fraction form
    872,308.20/1,308,462.30 = 809,322.60/x
  3. Step 3: Cross multiply
    872,308.20x = 1,308,462.30 × 809,322.60
  4. Step 4: Simplify right side
    872,308.20x = 1,058,968,110,637.98
  5. Step 5: Solve for x
    x = 1,058,968,110,637.98/872,308.20
  6. Step 6: Final answer
    x = 1,213,983.90

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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.