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Finding the Fourth Proportional to 667,107.69, 920,615.85 and 361,190.45

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Solution

The fourth proportional to 667,107.69, 920,615.85 and 361,190.45 is: 498,446.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,107.69 : 920,615.85 = 361,190.45 : x
  2. Step 2: Convert to fraction form
    667,107.69/920,615.85 = 361,190.45/x
  3. Step 3: Cross multiply
    667,107.69x = 920,615.85 × 361,190.45
  4. Step 4: Simplify right side
    667,107.69x = 332,517,648,535.55
  5. Step 5: Solve for x
    x = 332,517,648,535.55/667,107.69
  6. Step 6: Final answer
    x = 498,446.73

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1.5x scale

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.