Home / 378,156.32-521,853.22-208,390.58

Finding the Fourth Proportional to 378,156.32, 521,853.22 and 208,390.58

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Solution

The fourth proportional to 378,156.32, 521,853.22 and 208,390.58 is: 287,577.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,156.32 : 521,853.22 = 208,390.58 : x
  2. Step 2: Convert to fraction form
    378,156.32/521,853.22 = 208,390.58/x
  3. Step 3: Cross multiply
    378,156.32x = 521,853.22 × 208,390.58
  4. Step 4: Simplify right side
    378,156.32x = 108,749,295,190.67
  5. Step 5: Solve for x
    x = 108,749,295,190.67/378,156.32
  6. Step 6: Final answer
    x = 287,577.62

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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.