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Finding the Fourth Proportional to 667,457.52, 921,157.48 and 381,020.72

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Solution

The fourth proportional to 667,457.52, 921,157.48 and 381,020.72 is: 525,846.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,457.52 : 921,157.48 = 381,020.72 : x
  2. Step 2: Convert to fraction form
    667,457.52/921,157.48 = 381,020.72/x
  3. Step 3: Cross multiply
    667,457.52x = 921,157.48 × 381,020.72
  4. Step 4: Simplify right side
    667,457.52x = 350,980,086,262.99
  5. Step 5: Solve for x
    x = 350,980,086,262.99/667,457.52
  6. Step 6: Final answer
    x = 525,846.33

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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.