Home / 378,109.96-521,828.52-282,450.58

Finding the Fourth Proportional to 378,109.96, 521,828.52 and 282,450.58

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Solution

The fourth proportional to 378,109.96, 521,828.52 and 282,450.58 is: 389,809.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,109.96 : 521,828.52 = 282,450.58 : x
  2. Step 2: Convert to fraction form
    378,109.96/521,828.52 = 282,450.58/x
  3. Step 3: Cross multiply
    378,109.96x = 521,828.52 × 282,450.58
  4. Step 4: Simplify right side
    378,109.96x = 147,390,768,134.54
  5. Step 5: Solve for x
    x = 147,390,768,134.54/378,109.96
  6. Step 6: Final answer
    x = 389,809.27

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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.