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Finding the Fourth Proportional to 547,921.35, 755,641.87 and 343,991.30

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Solution

The fourth proportional to 547,921.35, 755,641.87 and 343,991.30 is: 474,400.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    547,921.35 : 755,641.87 = 343,991.30 : x
  2. Step 2: Convert to fraction form
    547,921.35/755,641.87 = 343,991.30/x
  3. Step 3: Cross multiply
    547,921.35x = 755,641.87 × 343,991.30
  4. Step 4: Simplify right side
    547,921.35x = 259,934,224,557.54
  5. Step 5: Solve for x
    x = 259,934,224,557.54/547,921.35
  6. Step 6: Final answer
    x = 474,400.61

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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.