Home / 431,376.06-647,040.38-131,856.46

Finding the Fourth Proportional to 431,376.06, 647,040.38 and 131,856.46

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Solution

The fourth proportional to 431,376.06, 647,040.38 and 131,856.46 is: 197,777.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,376.06 : 647,040.38 = 131,856.46 : x
  2. Step 2: Convert to fraction form
    431,376.06/647,040.38 = 131,856.46/x
  3. Step 3: Cross multiply
    431,376.06x = 647,040.38 × 131,856.46
  4. Step 4: Simplify right side
    431,376.06x = 85,316,453,983.85
  5. Step 5: Solve for x
    x = 85,316,453,983.85/431,376.06
  6. Step 6: Final answer
    x = 197,777.44

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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.