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Finding the Fourth Proportional to 383,942.40, 575,179.20 and 206,390.40

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Solution

The fourth proportional to 383,942.40, 575,179.20 and 206,390.40 is: 309,190.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,942.40 : 575,179.20 = 206,390.40 : x
  2. Step 2: Convert to fraction form
    383,942.40/575,179.20 = 206,390.40/x
  3. Step 3: Cross multiply
    383,942.40x = 575,179.20 × 206,390.40
  4. Step 4: Simplify right side
    383,942.40x = 118,711,465,159.68
  5. Step 5: Solve for x
    x = 118,711,465,159.68/383,942.40
  6. Step 6: Final answer
    x = 309,190.82

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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.