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Finding the Fourth Proportional to 378,395.35, 522,189.11 and 208,635.51

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Solution

The fourth proportional to 378,395.35, 522,189.11 and 208,635.51 is: 287,918.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,395.35 : 522,189.11 = 208,635.51 : x
  2. Step 2: Convert to fraction form
    378,395.35/522,189.11 = 208,635.51/x
  3. Step 3: Cross multiply
    378,395.35x = 522,189.11 × 208,635.51
  4. Step 4: Simplify right side
    378,395.35x = 108,947,193,108.36
  5. Step 5: Solve for x
    x = 108,947,193,108.36/378,395.35
  6. Step 6: Final answer
    x = 287,918.95

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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.