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Finding the Fourth Proportional to 263,642.40, 395,420.40 and 74,115.60

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Solution

The fourth proportional to 263,642.40, 395,420.40 and 74,115.60 is: 111,161.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,642.40 : 395,420.40 = 74,115.60 : x
  2. Step 2: Convert to fraction form
    263,642.40/395,420.40 = 74,115.60/x
  3. Step 3: Cross multiply
    263,642.40x = 395,420.40 × 74,115.60
  4. Step 4: Simplify right side
    263,642.40x = 29,306,820,198.24
  5. Step 5: Solve for x
    x = 29,306,820,198.24/263,642.40
  6. Step 6: Final answer
    x = 111,161.26

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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.