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Finding the Fourth Proportional to 667,441.50, 921,135.36 and 381,004.68

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Solution

The fourth proportional to 667,441.50, 921,135.36 and 381,004.68 is: 525,824.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,441.50 : 921,135.36 = 381,004.68 : x
  2. Step 2: Convert to fraction form
    667,441.50/921,135.36 = 381,004.68/x
  3. Step 3: Cross multiply
    667,441.50x = 921,135.36 × 381,004.68
  4. Step 4: Simplify right side
    667,441.50x = 350,956,883,073.49
  5. Step 5: Solve for x
    x = 350,956,883,073.49/667,441.50
  6. Step 6: Final answer
    x = 525,824.19

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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.