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Finding the Fourth Proportional to 667,072.33, 920,560.20 and 361,148.78

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Solution

The fourth proportional to 667,072.33, 920,560.20 and 361,148.78 is: 498,385.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,072.33 : 920,560.20 = 361,148.78 : x
  2. Step 2: Convert to fraction form
    667,072.33/920,560.20 = 361,148.78/x
  3. Step 3: Cross multiply
    667,072.33x = 920,560.20 × 361,148.78
  4. Step 4: Simplify right side
    667,072.33x = 332,459,194,093.65
  5. Step 5: Solve for x
    x = 332,459,194,093.65/667,072.33
  6. Step 6: Final answer
    x = 498,385.53

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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.