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Finding the Fourth Proportional to 318,938.56, 478,408.52 and 299,452.39

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Solution

The fourth proportional to 318,938.56, 478,408.52 and 299,452.39 is: 449,179.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,938.56 : 478,408.52 = 299,452.39 : x
  2. Step 2: Convert to fraction form
    318,938.56/478,408.52 = 299,452.39/x
  3. Step 3: Cross multiply
    318,938.56x = 478,408.52 × 299,452.39
  4. Step 4: Simplify right side
    318,938.56x = 143,260,573,213.10
  5. Step 5: Solve for x
    x = 143,260,573,213.10/318,938.56
  6. Step 6: Final answer
    x = 449,179.22

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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.