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Finding the Fourth Proportional to 620,408.43, 856,144.98 and 344,765.35

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Solution

The fourth proportional to 620,408.43, 856,144.98 and 344,765.35 is: 475,765.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,408.43 : 856,144.98 = 344,765.35 : x
  2. Step 2: Convert to fraction form
    620,408.43/856,144.98 = 344,765.35/x
  3. Step 3: Cross multiply
    620,408.43x = 856,144.98 × 344,765.35
  4. Step 4: Simplify right side
    620,408.43x = 295,169,123,680.44
  5. Step 5: Solve for x
    x = 295,169,123,680.44/620,408.43
  6. Step 6: Final answer
    x = 475,765.82

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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.