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Finding the Fourth Proportional to 318,990.44, 478,343.46 and 169,196.64

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Solution

The fourth proportional to 318,990.44, 478,343.46 and 169,196.64 is: 253,719.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,990.44 : 478,343.46 = 169,196.64 : x
  2. Step 2: Convert to fraction form
    318,990.44/478,343.46 = 169,196.64/x
  3. Step 3: Cross multiply
    318,990.44x = 478,343.46 × 169,196.64
  4. Step 4: Simplify right side
    318,990.44x = 80,934,106,197.97
  5. Step 5: Solve for x
    x = 80,934,106,197.97/318,990.44
  6. Step 6: Final answer
    x = 253,719.54

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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.