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Finding the Fourth Proportional to 399,270.62, 550,984.87 and 217,973.72

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Solution

The fourth proportional to 399,270.62, 550,984.87 and 217,973.72 is: 300,799.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,270.62 : 550,984.87 = 217,973.72 : x
  2. Step 2: Convert to fraction form
    399,270.62/550,984.87 = 217,973.72/x
  3. Step 3: Cross multiply
    399,270.62x = 550,984.87 × 217,973.72
  4. Step 4: Simplify right side
    399,270.62x = 120,100,221,777.62
  5. Step 5: Solve for x
    x = 120,100,221,777.62/399,270.62
  6. Step 6: Final answer
    x = 300,799.05

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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.