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Finding the Fourth Proportional to 398,787.69, 550,015.83 and 255,561.06

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Solution

The fourth proportional to 398,787.69, 550,015.83 and 255,561.06 is: 352,474.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,787.69 : 550,015.83 = 255,561.06 : x
  2. Step 2: Convert to fraction form
    398,787.69/550,015.83 = 255,561.06/x
  3. Step 3: Cross multiply
    398,787.69x = 550,015.83 × 255,561.06
  4. Step 4: Simplify right side
    398,787.69x = 140,562,628,531.58
  5. Step 5: Solve for x
    x = 140,562,628,531.58/398,787.69
  6. Step 6: Final answer
    x = 352,474.84

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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.