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Finding the Fourth Proportional to 362,704.80, 543,668.40 and 137,978.40

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Solution

The fourth proportional to 362,704.80, 543,668.40 and 137,978.40 is: 206,819.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    362,704.80 : 543,668.40 = 137,978.40 : x
  2. Step 2: Convert to fraction form
    362,704.80/543,668.40 = 137,978.40/x
  3. Step 3: Cross multiply
    362,704.80x = 543,668.40 × 137,978.40
  4. Step 4: Simplify right side
    362,704.80x = 75,014,495,962.56
  5. Step 5: Solve for x
    x = 75,014,495,962.56/362,704.80
  6. Step 6: Final answer
    x = 206,819.69

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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.