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Finding the Fourth Proportional to 521,469.56, 782,326.32 and 161,621.60

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Solution

The fourth proportional to 521,469.56, 782,326.32 and 161,621.60 is: 242,470.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,469.56 : 782,326.32 = 161,621.60 : x
  2. Step 2: Convert to fraction form
    521,469.56/782,326.32 = 161,621.60/x
  3. Step 3: Cross multiply
    521,469.56x = 782,326.32 × 161,621.60
  4. Step 4: Simplify right side
    521,469.56x = 126,440,827,042.80
  5. Step 5: Solve for x
    x = 126,440,827,042.80/521,469.56
  6. Step 6: Final answer
    x = 242,470.20

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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.