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Finding the Fourth Proportional to 378,079.56, 521,749.38 and 208,313.64

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Solution

The fourth proportional to 378,079.56, 521,749.38 and 208,313.64 is: 287,472.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,079.56 : 521,749.38 = 208,313.64 : x
  2. Step 2: Convert to fraction form
    378,079.56/521,749.38 = 208,313.64/x
  3. Step 3: Cross multiply
    378,079.56x = 521,749.38 × 208,313.64
  4. Step 4: Simplify right side
    378,079.56x = 108,687,512,515.54
  5. Step 5: Solve for x
    x = 108,687,512,515.54/378,079.56
  6. Step 6: Final answer
    x = 287,472.60

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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.