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Finding the Fourth Proportional to 318,538.80, 477,890.89 and 118,860.68

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Solution

The fourth proportional to 318,538.80, 477,890.89 and 118,860.68 is: 178,321.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,538.80 : 477,890.89 = 118,860.68 : x
  2. Step 2: Convert to fraction form
    318,538.80/477,890.89 = 118,860.68/x
  3. Step 3: Cross multiply
    318,538.80x = 477,890.89 × 118,860.68
  4. Step 4: Simplify right side
    318,538.80x = 56,802,437,048.78
  5. Step 5: Solve for x
    x = 56,802,437,048.78/318,538.80
  6. Step 6: Final answer
    x = 178,321.88

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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.