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Finding the Fourth Proportional to 439,485.69, 606,154.82 and 378,332.31

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Solution

The fourth proportional to 439,485.69, 606,154.82 and 378,332.31 is: 521,809.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,485.69 : 606,154.82 = 378,332.31 : x
  2. Step 2: Convert to fraction form
    439,485.69/606,154.82 = 378,332.31/x
  3. Step 3: Cross multiply
    439,485.69x = 606,154.82 × 378,332.31
  4. Step 4: Simplify right side
    439,485.69x = 229,327,951,376.57
  5. Step 5: Solve for x
    x = 229,327,951,376.57/439,485.69
  6. Step 6: Final answer
    x = 521,809.83

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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.