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Finding the Fourth Proportional to 485,167.96, 669,539.11 and 278,470.54

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Solution

The fourth proportional to 485,167.96, 669,539.11 and 278,470.54 is: 384,293.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,167.96 : 669,539.11 = 278,470.54 : x
  2. Step 2: Convert to fraction form
    485,167.96/669,539.11 = 278,470.54/x
  3. Step 3: Cross multiply
    485,167.96x = 669,539.11 × 278,470.54
  4. Step 4: Simplify right side
    485,167.96x = 186,446,915,142.80
  5. Step 5: Solve for x
    x = 186,446,915,142.80/485,167.96
  6. Step 6: Final answer
    x = 384,293.55

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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.