Home / 431,501.42-647,278.07-131,984.60

Finding the Fourth Proportional to 431,501.42, 647,278.07 and 131,984.60

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Solution

The fourth proportional to 431,501.42, 647,278.07 and 131,984.60 is: 197,984.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,501.42 : 647,278.07 = 131,984.60 : x
  2. Step 2: Convert to fraction form
    431,501.42/647,278.07 = 131,984.60/x
  3. Step 3: Cross multiply
    431,501.42x = 647,278.07 × 131,984.60
  4. Step 4: Simplify right side
    431,501.42x = 85,430,733,261.41
  5. Step 5: Solve for x
    x = 85,430,733,261.41/431,501.42
  6. Step 6: Final answer
    x = 197,984.82

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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.