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Finding the Fourth Proportional to 318,571.40, 477,930.94 and 108,209.48

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Solution

The fourth proportional to 318,571.40, 477,930.94 and 108,209.48 is: 162,339.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,571.40 : 477,930.94 = 108,209.48 : x
  2. Step 2: Convert to fraction form
    318,571.40/477,930.94 = 108,209.48/x
  3. Step 3: Cross multiply
    318,571.40x = 477,930.94 × 108,209.48
  4. Step 4: Simplify right side
    318,571.40x = 51,716,658,493.31
  5. Step 5: Solve for x
    x = 51,716,658,493.31/318,571.40
  6. Step 6: Final answer
    x = 162,339.30

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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.