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Finding the Fourth Proportional to 667,768.90, 921,840.24 and 381,233.62

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Solution

The fourth proportional to 667,768.90, 921,840.24 and 381,233.62 is: 526,284.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,768.90 : 921,840.24 = 381,233.62 : x
  2. Step 2: Convert to fraction form
    667,768.90/921,840.24 = 381,233.62/x
  3. Step 3: Cross multiply
    667,768.90x = 921,840.24 × 381,233.62
  4. Step 4: Simplify right side
    667,768.90x = 351,436,491,756.87
  5. Step 5: Solve for x
    x = 351,436,491,756.87/667,768.90
  6. Step 6: Final answer
    x = 526,284.60

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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.