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Finding the Fourth Proportional to 298,729.02, 447,850.32 and 138,905.62

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Solution

The fourth proportional to 298,729.02, 447,850.32 and 138,905.62 is: 208,245.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,729.02 : 447,850.32 = 138,905.62 : x
  2. Step 2: Convert to fraction form
    298,729.02/447,850.32 = 138,905.62/x
  3. Step 3: Cross multiply
    298,729.02x = 447,850.32 × 138,905.62
  4. Step 4: Simplify right side
    298,729.02x = 62,208,926,366.80
  5. Step 5: Solve for x
    x = 62,208,926,366.80/298,729.02
  6. Step 6: Final answer
    x = 208,245.34

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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.