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Finding the Fourth Proportional to 260,697.90, 391,192.65 and 110,912.70

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Solution

The fourth proportional to 260,697.90, 391,192.65 and 110,912.70 is: 166,431.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,697.90 : 391,192.65 = 110,912.70 : x
  2. Step 2: Convert to fraction form
    260,697.90/391,192.65 = 110,912.70/x
  3. Step 3: Cross multiply
    260,697.90x = 391,192.65 × 110,912.70
  4. Step 4: Simplify right side
    260,697.90x = 43,388,233,031.66
  5. Step 5: Solve for x
    x = 43,388,233,031.66/260,697.90
  6. Step 6: Final answer
    x = 166,431.08

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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.