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Finding the Fourth Proportional to 620,768.87, 856,676.25 and 348,820.46

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Solution

The fourth proportional to 620,768.87, 856,676.25 and 348,820.46 is: 481,380.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,768.87 : 856,676.25 = 348,820.46 : x
  2. Step 2: Convert to fraction form
    620,768.87/856,676.25 = 348,820.46/x
  3. Step 3: Cross multiply
    620,768.87x = 856,676.25 × 348,820.46
  4. Step 4: Simplify right side
    620,768.87x = 298,826,199,312.69
  5. Step 5: Solve for x
    x = 298,826,199,312.69/620,768.87
  6. Step 6: Final answer
    x = 481,380.78

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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.