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Finding the Fourth Proportional to 451,341, 672,976.38 and 438,940.71

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Solution

The fourth proportional to 451,341, 672,976.38 and 438,940.71 is: 654,486.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    451,341 : 672,976.38 = 438,940.71 : x
  2. Step 2: Convert to fraction form
    451,341/672,976.38 = 438,940.71/x
  3. Step 3: Cross multiply
    451,341x = 672,976.38 × 438,940.71
  4. Step 4: Simplify right side
    451,341x = 295,396,730,050.43
  5. Step 5: Solve for x
    x = 295,396,730,050.43/451,341
  6. Step 6: Final answer
    x = 654,486.81

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.