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Finding the Fourth Proportional to 413,745.20, 620,617.80 and 394,499.60

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Solution

The fourth proportional to 413,745.20, 620,617.80 and 394,499.60 is: 591,749.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    413,745.20 : 620,617.80 = 394,499.60 : x
  2. Step 2: Convert to fraction form
    413,745.20/620,617.80 = 394,499.60/x
  3. Step 3: Cross multiply
    413,745.20x = 620,617.80 × 394,499.60
  4. Step 4: Simplify right side
    413,745.20x = 244,833,473,852.88
  5. Step 5: Solve for x
    x = 244,833,473,852.88/413,745.20
  6. Step 6: Final answer
    x = 591,749.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.