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Finding the Fourth Proportional to 547,343.09, 755,326.31 and 305,629.77

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Solution

The fourth proportional to 547,343.09, 755,326.31 and 305,629.77 is: 421,765.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,343.09 : 755,326.31 = 305,629.77 : x
  2. Step 2: Convert to fraction form
    547,343.09/755,326.31 = 305,629.77/x
  3. Step 3: Cross multiply
    547,343.09x = 755,326.31 × 305,629.77
  4. Step 4: Simplify right side
    547,343.09x = 230,850,204,872.10
  5. Step 5: Solve for x
    x = 230,850,204,872.10/547,343.09
  6. Step 6: Final answer
    x = 421,765.09

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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.