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Finding the Fourth Proportional to 667,757.90, 921,825.08 and 381,222.62

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Solution

The fourth proportional to 667,757.90, 921,825.08 and 381,222.62 is: 526,269.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,757.90 : 921,825.08 = 381,222.62 : x
  2. Step 2: Convert to fraction form
    667,757.90/921,825.08 = 381,222.62/x
  3. Step 3: Cross multiply
    667,757.90x = 921,825.08 × 381,222.62
  4. Step 4: Simplify right side
    667,757.90x = 351,420,572,179.31
  5. Step 5: Solve for x
    x = 351,420,572,179.31/667,757.90
  6. Step 6: Final answer
    x = 526,269.43

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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.