Home / 426,105.20-639,157.80-268,511.60

Finding the Fourth Proportional to 426,105.20, 639,157.80 and 268,511.60

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Solution

The fourth proportional to 426,105.20, 639,157.80 and 268,511.60 is: 402,767.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,105.20 : 639,157.80 = 268,511.60 : x
  2. Step 2: Convert to fraction form
    426,105.20/639,157.80 = 268,511.60/x
  3. Step 3: Cross multiply
    426,105.20x = 639,157.80 × 268,511.60
  4. Step 4: Simplify right side
    426,105.20x = 171,621,283,530.48
  5. Step 5: Solve for x
    x = 171,621,283,530.48/426,105.20
  6. Step 6: Final answer
    x = 402,767.40

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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.