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Finding the Fourth Proportional to 426,604.88, 640,012.56 and 127,084.29

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Solution

The fourth proportional to 426,604.88, 640,012.56 and 127,084.29 is: 190,657.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,604.88 : 640,012.56 = 127,084.29 : x
  2. Step 2: Convert to fraction form
    426,604.88/640,012.56 = 127,084.29/x
  3. Step 3: Cross multiply
    426,604.88x = 640,012.56 × 127,084.29
  4. Step 4: Simplify right side
    426,604.88x = 81,335,542,255.25
  5. Step 5: Solve for x
    x = 81,335,542,255.25/426,604.88
  6. Step 6: Final answer
    x = 190,657.79

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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.