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Finding the Fourth Proportional to 541,405.60, 809,804.40 and 485,648.80

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Solution

The fourth proportional to 541,405.60, 809,804.40 and 485,648.80 is: 726,406.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    541,405.60 : 809,804.40 = 485,648.80 : x
  2. Step 2: Convert to fraction form
    541,405.60/809,804.40 = 485,648.80/x
  3. Step 3: Cross multiply
    541,405.60x = 809,804.40 × 485,648.80
  4. Step 4: Simplify right side
    541,405.60x = 393,280,535,094.72
  5. Step 5: Solve for x
    x = 393,280,535,094.72/541,405.60
  6. Step 6: Final answer
    x = 726,406.48

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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.