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Finding the Fourth Proportional to 263,431.80, 363,512.88 and 155,982.60

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Solution

The fourth proportional to 263,431.80, 363,512.88 and 155,982.60 is: 215,242.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,431.80 : 363,512.88 = 155,982.60 : x
  2. Step 2: Convert to fraction form
    263,431.80/363,512.88 = 155,982.60/x
  3. Step 3: Cross multiply
    263,431.80x = 363,512.88 × 155,982.60
  4. Step 4: Simplify right side
    263,431.80x = 56,701,684,155.89
  5. Step 5: Solve for x
    x = 56,701,684,155.89/263,431.80
  6. Step 6: Final answer
    x = 215,242.37

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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.