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Finding the Fourth Proportional to 426,614.96, 639,960.71 and 111,074.60

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Solution

The fourth proportional to 426,614.96, 639,960.71 and 111,074.60 is: 166,621.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,614.96 : 639,960.71 = 111,074.60 : x
  2. Step 2: Convert to fraction form
    426,614.96/639,960.71 = 111,074.60/x
  3. Step 3: Cross multiply
    426,614.96x = 639,960.71 × 111,074.60
  4. Step 4: Simplify right side
    426,614.96x = 71,083,379,878.97
  5. Step 5: Solve for x
    x = 71,083,379,878.97/426,614.96
  6. Step 6: Final answer
    x = 166,621.86

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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.