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Finding the Fourth Proportional to 318,967.92, 478,451.88 and 218,824.56

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Solution

The fourth proportional to 318,967.92, 478,451.88 and 218,824.56 is: 328,236.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,967.92 : 478,451.88 = 218,824.56 : x
  2. Step 2: Convert to fraction form
    318,967.92/478,451.88 = 218,824.56/x
  3. Step 3: Cross multiply
    318,967.92x = 478,451.88 × 218,824.56
  4. Step 4: Simplify right side
    318,967.92x = 104,697,022,122.17
  5. Step 5: Solve for x
    x = 104,697,022,122.17/318,967.92
  6. Step 6: Final answer
    x = 328,236.84

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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.