Home / 378,016.90-521,657.49-208,257.10

Finding the Fourth Proportional to 378,016.90, 521,657.49 and 208,257.10

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Solution

The fourth proportional to 378,016.90, 521,657.49 and 208,257.10 is: 287,391.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,016.90 : 521,657.49 = 208,257.10 : x
  2. Step 2: Convert to fraction form
    378,016.90/521,657.49 = 208,257.10/x
  3. Step 3: Cross multiply
    378,016.90x = 521,657.49 × 208,257.10
  4. Step 4: Simplify right side
    378,016.90x = 108,638,876,060.68
  5. Step 5: Solve for x
    x = 108,638,876,060.68/378,016.90
  6. Step 6: Final answer
    x = 287,391.59

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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.