Home / 689,284.42-951,149.74-398,845.78

Finding the Fourth Proportional to 689,284.42, 951,149.74 and 398,845.78

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Solution

The fourth proportional to 689,284.42, 951,149.74 and 398,845.78 is: 550,370.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,284.42 : 951,149.74 = 398,845.78 : x
  2. Step 2: Convert to fraction form
    689,284.42/951,149.74 = 398,845.78/x
  3. Step 3: Cross multiply
    689,284.42x = 951,149.74 × 398,845.78
  4. Step 4: Simplify right side
    689,284.42x = 379,362,059,947.10
  5. Step 5: Solve for x
    x = 379,362,059,947.10/689,284.42
  6. Step 6: Final answer
    x = 550,370.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.