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Finding the Fourth Proportional to 378,339.66, 522,112.30 and 208,579.86

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Solution

The fourth proportional to 378,339.66, 522,112.30 and 208,579.86 is: 287,842.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,339.66 : 522,112.30 = 208,579.86 : x
  2. Step 2: Convert to fraction form
    378,339.66/522,112.30 = 208,579.86/x
  3. Step 3: Cross multiply
    378,339.66x = 522,112.30 × 208,579.86
  4. Step 4: Simplify right side
    378,339.66x = 108,902,109,916.83
  5. Step 5: Solve for x
    x = 108,902,109,916.83/378,339.66
  6. Step 6: Final answer
    x = 287,842.17

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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.