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Finding the Fourth Proportional to 263,392.96, 395,113.44 and 85,854.40

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Solution

The fourth proportional to 263,392.96, 395,113.44 and 85,854.40 is: 128,789.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,392.96 : 395,113.44 = 85,854.40 : x
  2. Step 2: Convert to fraction form
    263,392.96/395,113.44 = 85,854.40/x
  3. Step 3: Cross multiply
    263,392.96x = 395,113.44 × 85,854.40
  4. Step 4: Simplify right side
    263,392.96x = 33,922,227,323.14
  5. Step 5: Solve for x
    x = 33,922,227,323.14/263,392.96
  6. Step 6: Final answer
    x = 128,789.42

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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.