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Finding the Fourth Proportional to 259,466.90, 389,186.37 and 99,619.47

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Solution

The fourth proportional to 259,466.90, 389,186.37 and 99,619.47 is: 149,423.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,466.90 : 389,186.37 = 99,619.47 : x
  2. Step 2: Convert to fraction form
    259,466.90/389,186.37 = 99,619.47/x
  3. Step 3: Cross multiply
    259,466.90x = 389,186.37 × 99,619.47
  4. Step 4: Simplify right side
    259,466.90x = 38,770,539,910.62
  5. Step 5: Solve for x
    x = 38,770,539,910.62/259,466.90
  6. Step 6: Final answer
    x = 149,423.84

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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.