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Finding the Fourth Proportional to 398,550.80, 548,880.36 and 389,841.68

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Solution

The fourth proportional to 398,550.80, 548,880.36 and 389,841.68 is: 536,886.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,550.80 : 548,880.36 = 389,841.68 : x
  2. Step 2: Convert to fraction form
    398,550.80/548,880.36 = 389,841.68/x
  3. Step 3: Cross multiply
    398,550.80x = 548,880.36 × 389,841.68
  4. Step 4: Simplify right side
    398,550.80x = 213,976,441,661.41
  5. Step 5: Solve for x
    x = 213,976,441,661.41/398,550.80
  6. Step 6: Final answer
    x = 536,886.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.