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Finding the Fourth Proportional to 545,408.40, 818,112.60 and 171,431.40

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Solution

The fourth proportional to 545,408.40, 818,112.60 and 171,431.40 is: 257,147.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,408.40 : 818,112.60 = 171,431.40 : x
  2. Step 2: Convert to fraction form
    545,408.40/818,112.60 = 171,431.40/x
  3. Step 3: Cross multiply
    545,408.40x = 818,112.60 × 171,431.40
  4. Step 4: Simplify right side
    545,408.40x = 140,250,188,375.64
  5. Step 5: Solve for x
    x = 140,250,188,375.64/545,408.40
  6. Step 6: Final answer
    x = 257,147.10

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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.