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Finding the Fourth Proportional to 399,243.40, 550,964.23 and 217,962.97

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Solution

The fourth proportional to 399,243.40, 550,964.23 and 217,962.97 is: 300,793.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,243.40 : 550,964.23 = 217,962.97 : x
  2. Step 2: Convert to fraction form
    399,243.40/550,964.23 = 217,962.97/x
  3. Step 3: Cross multiply
    399,243.40x = 550,964.23 × 217,962.97
  4. Step 4: Simplify right side
    399,243.40x = 120,089,796,089.93
  5. Step 5: Solve for x
    x = 120,089,796,089.93/399,243.40
  6. Step 6: Final answer
    x = 300,793.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.