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Finding the Fourth Proportional to 667,063.10, 920,540.40 and 361,131.38

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Solution

The fourth proportional to 667,063.10, 920,540.40 and 361,131.38 is: 498,357.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,063.10 : 920,540.40 = 361,131.38 : x
  2. Step 2: Convert to fraction form
    667,063.10/920,540.40 = 361,131.38/x
  3. Step 3: Cross multiply
    667,063.10x = 920,540.40 × 361,131.38
  4. Step 4: Simplify right side
    667,063.10x = 332,436,024,997.75
  5. Step 5: Solve for x
    x = 332,436,024,997.75/667,063.10
  6. Step 6: Final answer
    x = 498,357.69

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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.