Home / 426,293.20-639,439.80-408,091.60

Finding the Fourth Proportional to 426,293.20, 639,439.80 and 408,091.60

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Solution

The fourth proportional to 426,293.20, 639,439.80 and 408,091.60 is: 612,137.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,293.20 : 639,439.80 = 408,091.60 : x
  2. Step 2: Convert to fraction form
    426,293.20/639,439.80 = 408,091.60/x
  3. Step 3: Cross multiply
    426,293.20x = 639,439.80 × 408,091.60
  4. Step 4: Simplify right side
    426,293.20x = 260,950,011,085.68
  5. Step 5: Solve for x
    x = 260,950,011,085.68/426,293.20
  6. Step 6: Final answer
    x = 612,137.40

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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.