Home / 426,415.14-639,511.20-126,815.04

Finding the Fourth Proportional to 426,415.14, 639,511.20 and 126,815.04

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Solution

The fourth proportional to 426,415.14, 639,511.20 and 126,815.04 is: 190,189.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,415.14 : 639,511.20 = 126,815.04 : x
  2. Step 2: Convert to fraction form
    426,415.14/639,511.20 = 126,815.04/x
  3. Step 3: Cross multiply
    426,415.14x = 639,511.20 × 126,815.04
  4. Step 4: Simplify right side
    426,415.14x = 81,099,638,408.45
  5. Step 5: Solve for x
    x = 81,099,638,408.45/426,415.14
  6. Step 6: Final answer
    x = 190,189.40

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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.