Home / 645,470.33-967,319.75-408,388.59

Finding the Fourth Proportional to 645,470.33, 967,319.75 and 408,388.59

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Solution

The fourth proportional to 645,470.33, 967,319.75 and 408,388.59 is: 612,022.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,470.33 : 967,319.75 = 408,388.59 : x
  2. Step 2: Convert to fraction form
    645,470.33/967,319.75 = 408,388.59/x
  3. Step 3: Cross multiply
    645,470.33x = 967,319.75 × 408,388.59
  4. Step 4: Simplify right side
    645,470.33x = 395,042,346,739.71
  5. Step 5: Solve for x
    x = 395,042,346,739.71/645,470.33
  6. Step 6: Final answer
    x = 612,022.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.