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Finding the Fourth Proportional to 521,478.69, 782,340.08 and 161,630.73

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Solution

The fourth proportional to 521,478.69, 782,340.08 and 161,630.73 is: 242,483.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,478.69 : 782,340.08 = 161,630.73 : x
  2. Step 2: Convert to fraction form
    521,478.69/782,340.08 = 161,630.73/x
  3. Step 3: Cross multiply
    521,478.69x = 782,340.08 × 161,630.73
  4. Step 4: Simplify right side
    521,478.69x = 126,450,198,238.66
  5. Step 5: Solve for x
    x = 126,450,198,238.66/521,478.69
  6. Step 6: Final answer
    x = 242,483.92

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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.