Home / 426,380.34-639,512.16-126,907.14

Finding the Fourth Proportional to 426,380.34, 639,512.16 and 126,907.14

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Solution

The fourth proportional to 426,380.34, 639,512.16 and 126,907.14 is: 190,343.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,380.34 : 639,512.16 = 126,907.14 : x
  2. Step 2: Convert to fraction form
    426,380.34/639,512.16 = 126,907.14/x
  3. Step 3: Cross multiply
    426,380.34x = 639,512.16 × 126,907.14
  4. Step 4: Simplify right side
    426,380.34x = 81,158,659,220.82
  5. Step 5: Solve for x
    x = 81,158,659,220.82/426,380.34
  6. Step 6: Final answer
    x = 190,343.34

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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.