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Finding the Fourth Proportional to 667,251.21, 920,872.53 and 380,814.15

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Solution

The fourth proportional to 667,251.21, 920,872.53 and 380,814.15 is: 525,561.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,251.21 : 920,872.53 = 380,814.15 : x
  2. Step 2: Convert to fraction form
    667,251.21/920,872.53 = 380,814.15/x
  3. Step 3: Cross multiply
    667,251.21x = 920,872.53 × 380,814.15
  4. Step 4: Simplify right side
    667,251.21x = 350,681,289,770.30
  5. Step 5: Solve for x
    x = 350,681,289,770.30/667,251.21
  6. Step 6: Final answer
    x = 525,561.11

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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.