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Finding the Fourth Proportional to 378,493.56, 521,662.68 and 276,350.94

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Solution

The fourth proportional to 378,493.56, 521,662.68 and 276,350.94 is: 380,883.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,493.56 : 521,662.68 = 276,350.94 : x
  2. Step 2: Convert to fraction form
    378,493.56/521,662.68 = 276,350.94/x
  3. Step 3: Cross multiply
    378,493.56x = 521,662.68 × 276,350.94
  4. Step 4: Simplify right side
    378,493.56x = 144,161,971,980.92
  5. Step 5: Solve for x
    x = 144,161,971,980.92/378,493.56
  6. Step 6: Final answer
    x = 380,883.55

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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.