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Finding the Fourth Proportional to 541,391.60, 809,783.40 and 485,634.80

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Solution

The fourth proportional to 541,391.60, 809,783.40 and 485,634.80 is: 726,385.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    541,391.60 : 809,783.40 = 485,634.80 : x
  2. Step 2: Convert to fraction form
    541,391.60/809,783.40 = 485,634.80/x
  3. Step 3: Cross multiply
    541,391.60x = 809,783.40 × 485,634.80
  4. Step 4: Simplify right side
    541,391.60x = 393,258,999,502.32
  5. Step 5: Solve for x
    x = 393,258,999,502.32/541,391.60
  6. Step 6: Final answer
    x = 726,385.48

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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.