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Finding the Fourth Proportional to 689,470.30, 950,684.43 and 485,455.96

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Solution

The fourth proportional to 689,470.30, 950,684.43 and 485,455.96 is: 669,376.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    689,470.30 : 950,684.43 = 485,455.96 : x
  2. Step 2: Convert to fraction form
    689,470.30/950,684.43 = 485,455.96/x
  3. Step 3: Cross multiply
    689,470.30x = 950,684.43 × 485,455.96
  4. Step 4: Simplify right side
    689,470.30x = 461,515,422,622.70
  5. Step 5: Solve for x
    x = 461,515,422,622.70/689,470.30
  6. Step 6: Final answer
    x = 669,376.80

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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.