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Finding the Fourth Proportional to 541,390.60, 809,781.90 and 485,633.80

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Solution

The fourth proportional to 541,390.60, 809,781.90 and 485,633.80 is: 726,383.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    541,390.60 : 809,781.90 = 485,633.80 : x
  2. Step 2: Convert to fraction form
    541,390.60/809,781.90 = 485,633.80/x
  3. Step 3: Cross multiply
    541,390.60x = 809,781.90 × 485,633.80
  4. Step 4: Simplify right side
    541,390.60x = 393,257,461,268.22
  5. Step 5: Solve for x
    x = 393,257,461,268.22/541,390.60
  6. Step 6: Final answer
    x = 726,383.98

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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.