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Finding the Fourth Proportional to 263,640.80, 395,479.65 and 105,869.25

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Solution

The fourth proportional to 263,640.80, 395,479.65 and 105,869.25 is: 158,811.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,640.80 : 395,479.65 = 105,869.25 : x
  2. Step 2: Convert to fraction form
    263,640.80/395,479.65 = 105,869.25/x
  3. Step 3: Cross multiply
    263,640.80x = 395,479.65 × 105,869.25
  4. Step 4: Simplify right side
    263,640.80x = 41,869,133,406.42
  5. Step 5: Solve for x
    x = 41,869,133,406.42/263,640.80
  6. Step 6: Final answer
    x = 158,811.28

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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.