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Finding the Fourth Proportional to 445,791.72, 616,005.90 and 324,721.56

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Solution

The fourth proportional to 445,791.72, 616,005.90 and 324,721.56 is: 448,708.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,791.72 : 616,005.90 = 324,721.56 : x
  2. Step 2: Convert to fraction form
    445,791.72/616,005.90 = 324,721.56/x
  3. Step 3: Cross multiply
    445,791.72x = 616,005.90 × 324,721.56
  4. Step 4: Simplify right side
    445,791.72x = 200,030,396,817.20
  5. Step 5: Solve for x
    x = 200,030,396,817.20/445,791.72
  6. Step 6: Final answer
    x = 448,708.19

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1.5x scale

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.