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Finding the Fourth Proportional to 667,042.55, 920,517.58 and 361,118.81

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Solution

The fourth proportional to 667,042.55, 920,517.58 and 361,118.81 is: 498,343.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,042.55 : 920,517.58 = 361,118.81 : x
  2. Step 2: Convert to fraction form
    667,042.55/920,517.58 = 361,118.81/x
  3. Step 3: Cross multiply
    667,042.55x = 920,517.58 × 361,118.81
  4. Step 4: Simplify right side
    667,042.55x = 332,416,213,073.68
  5. Step 5: Solve for x
    x = 332,416,213,073.68/667,042.55
  6. Step 6: Final answer
    x = 498,343.34

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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.