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Finding the Fourth Proportional to 689,469.30, 950,683.05 and 485,454.96

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Solution

The fourth proportional to 689,469.30, 950,683.05 and 485,454.96 is: 669,375.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,469.30 : 950,683.05 = 485,454.96 : x
  2. Step 2: Convert to fraction form
    689,469.30/950,683.05 = 485,454.96/x
  3. Step 3: Cross multiply
    689,469.30x = 950,683.05 × 485,454.96
  4. Step 4: Simplify right side
    689,469.30x = 461,513,802,010.43
  5. Step 5: Solve for x
    x = 461,513,802,010.43/689,469.30
  6. Step 6: Final answer
    x = 669,375.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.