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Finding the Fourth Proportional to 667,251.96, 920,873.57 and 380,814.90

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Solution

The fourth proportional to 667,251.96, 920,873.57 and 380,814.90 is: 525,562.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,251.96 : 920,873.57 = 380,814.90 : x
  2. Step 2: Convert to fraction form
    667,251.96/920,873.57 = 380,814.90/x
  3. Step 3: Cross multiply
    667,251.96x = 920,873.57 × 380,814.90
  4. Step 4: Simplify right side
    667,251.96x = 350,682,376,472.19
  5. Step 5: Solve for x
    x = 350,682,376,472.19/667,251.96
  6. Step 6: Final answer
    x = 525,562.15

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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.