Home / 378,379.38-521,842.30-319,730.19

Finding the Fourth Proportional to 378,379.38, 521,842.30 and 319,730.19

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Solution

The fourth proportional to 378,379.38, 521,842.30 and 319,730.19 is: 440,956.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,379.38 : 521,842.30 = 319,730.19 : x
  2. Step 2: Convert to fraction form
    378,379.38/521,842.30 = 319,730.19/x
  3. Step 3: Cross multiply
    378,379.38x = 521,842.30 × 319,730.19
  4. Step 4: Simplify right side
    378,379.38x = 166,848,734,972.80
  5. Step 5: Solve for x
    x = 166,848,734,972.80/378,379.38
  6. Step 6: Final answer
    x = 440,956.20

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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.