Home / 378,211.72-521,929.38-208,445.80

Finding the Fourth Proportional to 378,211.72, 521,929.38 and 208,445.80

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Solution

The fourth proportional to 378,211.72, 521,929.38 and 208,445.80 is: 287,653.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,211.72 : 521,929.38 = 208,445.80 : x
  2. Step 2: Convert to fraction form
    378,211.72/521,929.38 = 208,445.80/x
  3. Step 3: Cross multiply
    378,211.72x = 521,929.38 × 208,445.80
  4. Step 4: Simplify right side
    378,211.72x = 108,793,987,157.60
  5. Step 5: Solve for x
    x = 108,793,987,157.60/378,211.72
  6. Step 6: Final answer
    x = 287,653.66

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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.