Home / 641,378.28-961,914.29-191,978.54

Finding the Fourth Proportional to 641,378.28, 961,914.29 and 191,978.54

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Solution

The fourth proportional to 641,378.28, 961,914.29 and 191,978.54 is: 287,921.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,378.28 : 961,914.29 = 191,978.54 : x
  2. Step 2: Convert to fraction form
    641,378.28/961,914.29 = 191,978.54/x
  3. Step 3: Cross multiply
    641,378.28x = 961,914.29 × 191,978.54
  4. Step 4: Simplify right side
    641,378.28x = 184,666,898,837.05
  5. Step 5: Solve for x
    x = 184,666,898,837.05/641,378.28
  6. Step 6: Final answer
    x = 287,921.97

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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.