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Finding the Fourth Proportional to 318,392.60, 477,487.24 and 105,120.96

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Solution

The fourth proportional to 318,392.60, 477,487.24 and 105,120.96 is: 157,647.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,392.60 : 477,487.24 = 105,120.96 : x
  2. Step 2: Convert to fraction form
    318,392.60/477,487.24 = 105,120.96/x
  3. Step 3: Cross multiply
    318,392.60x = 477,487.24 × 105,120.96
  4. Step 4: Simplify right side
    318,392.60x = 50,193,917,056.55
  5. Step 5: Solve for x
    x = 50,193,917,056.55/318,392.60
  6. Step 6: Final answer
    x = 157,647.88

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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.