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Finding the Fourth Proportional to 399,245.34, 550,966.91 and 217,964.91

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Solution

The fourth proportional to 399,245.34, 550,966.91 and 217,964.91 is: 300,796.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,245.34 : 550,966.91 = 217,964.91 : x
  2. Step 2: Convert to fraction form
    399,245.34/550,966.91 = 217,964.91/x
  3. Step 3: Cross multiply
    399,245.34x = 550,966.91 × 217,964.91
  4. Step 4: Simplify right side
    399,245.34x = 120,091,451,861.30
  5. Step 5: Solve for x
    x = 120,091,451,861.30/399,245.34
  6. Step 6: Final answer
    x = 300,796.13

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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.