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Finding the Fourth Proportional to 318,408.68, 477,391.59 and 118,675.44

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Solution

The fourth proportional to 318,408.68, 477,391.59 and 118,675.44 is: 177,930.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,408.68 : 477,391.59 = 118,675.44 : x
  2. Step 2: Convert to fraction form
    318,408.68/477,391.59 = 118,675.44/x
  3. Step 3: Cross multiply
    318,408.68x = 477,391.59 × 118,675.44
  4. Step 4: Simplify right side
    318,408.68x = 56,654,656,995.55
  5. Step 5: Solve for x
    x = 56,654,656,995.55/318,408.68
  6. Step 6: Final answer
    x = 177,930.63

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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.