Home / 1,918,819.28-2,878,188.72-639,519.36

Finding the Fourth Proportional to 1,918,819.28, 2,878,188.72 and 639,519.36

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Solution

The fourth proportional to 1,918,819.28, 2,878,188.72 and 639,519.36 is: 959,265.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918,819.28 : 2,878,188.72 = 639,519.36 : x
  2. Step 2: Convert to fraction form
    1,918,819.28/2,878,188.72 = 639,519.36/x
  3. Step 3: Cross multiply
    1,918,819.28x = 2,878,188.72 × 639,519.36
  4. Step 4: Simplify right side
    1,918,819.28x = 1,840,657,408,173.62
  5. Step 5: Solve for x
    x = 1,840,657,408,173.62/1,918,819.28
  6. Step 6: Final answer
    x = 959,265.64

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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.