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Finding the Fourth Proportional to 318,895.03, 478,343.15 and 299,408.86

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Solution

The fourth proportional to 318,895.03, 478,343.15 and 299,408.86 is: 449,113.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,895.03 : 478,343.15 = 299,408.86 : x
  2. Step 2: Convert to fraction form
    318,895.03/478,343.15 = 299,408.86/x
  3. Step 3: Cross multiply
    318,895.03x = 478,343.15 × 299,408.86
  4. Step 4: Simplify right side
    318,895.03x = 143,220,177,230.31
  5. Step 5: Solve for x
    x = 143,220,177,230.31/318,895.03
  6. Step 6: Final answer
    x = 449,113.86

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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.