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Finding the Fourth Proportional to 323,605.89, 485,027.60 and 145,904.85

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Solution

The fourth proportional to 323,605.89, 485,027.60 and 145,904.85 is: 218,685.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,605.89 : 485,027.60 = 145,904.85 : x
  2. Step 2: Convert to fraction form
    323,605.89/485,027.60 = 145,904.85/x
  3. Step 3: Cross multiply
    323,605.89x = 485,027.60 × 145,904.85
  4. Step 4: Simplify right side
    323,605.89x = 70,767,878,494.34
  5. Step 5: Solve for x
    x = 70,767,878,494.34/323,605.89
  6. Step 6: Final answer
    x = 218,685.38

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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.