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Finding the Fourth Proportional to 263,479.20, 395,218.80 and 121,324.20

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Solution

The fourth proportional to 263,479.20, 395,218.80 and 121,324.20 is: 181,986.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,479.20 : 395,218.80 = 121,324.20 : x
  2. Step 2: Convert to fraction form
    263,479.20/395,218.80 = 121,324.20/x
  3. Step 3: Cross multiply
    263,479.20x = 395,218.80 × 121,324.20
  4. Step 4: Simplify right side
    263,479.20x = 47,949,604,734.96
  5. Step 5: Solve for x
    x = 47,949,604,734.96/263,479.20
  6. Step 6: Final answer
    x = 181,986.30

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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.