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Finding the Fourth Proportional to 318,581.58, 477,604.53 and 213,078.54

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Solution

The fourth proportional to 318,581.58, 477,604.53 and 213,078.54 is: 319,438.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,581.58 : 477,604.53 = 213,078.54 : x
  2. Step 2: Convert to fraction form
    318,581.58/477,604.53 = 213,078.54/x
  3. Step 3: Cross multiply
    318,581.58x = 477,604.53 × 213,078.54
  4. Step 4: Simplify right side
    318,581.58x = 101,767,275,949.79
  5. Step 5: Solve for x
    x = 101,767,275,949.79/318,581.58
  6. Step 6: Final answer
    x = 319,438.67

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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.