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Finding the Fourth Proportional to 318,313.78, 477,501.81 and 115,964.85

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Solution

The fourth proportional to 318,313.78, 477,501.81 and 115,964.85 is: 173,958.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,313.78 : 477,501.81 = 115,964.85 : x
  2. Step 2: Convert to fraction form
    318,313.78/477,501.81 = 115,964.85/x
  3. Step 3: Cross multiply
    318,313.78x = 477,501.81 × 115,964.85
  4. Step 4: Simplify right side
    318,313.78x = 55,373,423,383.87
  5. Step 5: Solve for x
    x = 55,373,423,383.87/318,313.78
  6. Step 6: Final answer
    x = 173,958.61

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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.