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Finding the Fourth Proportional to 318,058.75, 439,023.53 and 203,645.44

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Solution

The fourth proportional to 318,058.75, 439,023.53 and 203,645.44 is: 281,096.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,058.75 : 439,023.53 = 203,645.44 : x
  2. Step 2: Convert to fraction form
    318,058.75/439,023.53 = 203,645.44/x
  3. Step 3: Cross multiply
    318,058.75x = 439,023.53 × 203,645.44
  4. Step 4: Simplify right side
    318,058.75x = 89,405,136,723.86
  5. Step 5: Solve for x
    x = 89,405,136,723.86/318,058.75
  6. Step 6: Final answer
    x = 281,096.30

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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.