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Finding the Fourth Proportional to 642,958.37, 965,015.74 and 343,694.75

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Solution

The fourth proportional to 642,958.37, 965,015.74 and 343,694.75 is: 515,851.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,958.37 : 965,015.74 = 343,694.75 : x
  2. Step 2: Convert to fraction form
    642,958.37/965,015.74 = 343,694.75/x
  3. Step 3: Cross multiply
    642,958.37x = 965,015.74 × 343,694.75
  4. Step 4: Simplify right side
    642,958.37x = 331,670,843,505.37
  5. Step 5: Solve for x
    x = 331,670,843,505.37/642,958.37
  6. Step 6: Final answer
    x = 515,851.20

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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.