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Finding the Fourth Proportional to 378,349.66, 522,126.17 and 208,589.86

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Solution

The fourth proportional to 378,349.66, 522,126.17 and 208,589.86 is: 287,856.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,349.66 : 522,126.17 = 208,589.86 : x
  2. Step 2: Convert to fraction form
    378,349.66/522,126.17 = 208,589.86/x
  3. Step 3: Cross multiply
    378,349.66x = 522,126.17 × 208,589.86
  4. Step 4: Simplify right side
    378,349.66x = 108,910,223,659.69
  5. Step 5: Solve for x
    x = 108,910,223,659.69/378,349.66
  6. Step 6: Final answer
    x = 287,856.01

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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.