Home / 420,397.30-630,591.78-192,628.36

Finding the Fourth Proportional to 420,397.30, 630,591.78 and 192,628.36

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Solution

The fourth proportional to 420,397.30, 630,591.78 and 192,628.36 is: 288,940.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,397.30 : 630,591.78 = 192,628.36 : x
  2. Step 2: Convert to fraction form
    420,397.30/630,591.78 = 192,628.36/x
  3. Step 3: Cross multiply
    420,397.30x = 630,591.78 × 192,628.36
  4. Step 4: Simplify right side
    420,397.30x = 121,469,860,410.88
  5. Step 5: Solve for x
    x = 121,469,860,410.88/420,397.30
  6. Step 6: Final answer
    x = 288,940.63

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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.