Home / 426,912.18-640,273.92-123,240.34

Finding the Fourth Proportional to 426,912.18, 640,273.92 and 123,240.34

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Solution

The fourth proportional to 426,912.18, 640,273.92 and 123,240.34 is: 184,833.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,912.18 : 640,273.92 = 123,240.34 : x
  2. Step 2: Convert to fraction form
    426,912.18/640,273.92 = 123,240.34/x
  3. Step 3: Cross multiply
    426,912.18x = 640,273.92 × 123,240.34
  4. Step 4: Simplify right side
    426,912.18x = 78,907,573,370.42
  5. Step 5: Solve for x
    x = 78,907,573,370.42/426,912.18
  6. Step 6: Final answer
    x = 184,833.27

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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.