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Finding the Fourth Proportional to 445,849.60, 668,860.80 and 193,129.60

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Solution

The fourth proportional to 445,849.60, 668,860.80 and 193,129.60 is: 289,731.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,849.60 : 668,860.80 = 193,129.60 : x
  2. Step 2: Convert to fraction form
    445,849.60/668,860.80 = 193,129.60/x
  3. Step 3: Cross multiply
    445,849.60x = 668,860.80 × 193,129.60
  4. Step 4: Simplify right side
    445,849.60x = 129,176,818,759.68
  5. Step 5: Solve for x
    x = 129,176,818,759.68/445,849.60
  6. Step 6: Final answer
    x = 289,731.83

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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.