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Finding the Fourth Proportional to 399,045.72, 550,694.85 and 217,769.39

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Solution

The fourth proportional to 399,045.72, 550,694.85 and 217,769.39 is: 300,528.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,045.72 : 550,694.85 = 217,769.39 : x
  2. Step 2: Convert to fraction form
    399,045.72/550,694.85 = 217,769.39/x
  3. Step 3: Cross multiply
    399,045.72x = 550,694.85 × 217,769.39
  4. Step 4: Simplify right side
    399,045.72x = 119,924,484,378.25
  5. Step 5: Solve for x
    x = 119,924,484,378.25/399,045.72
  6. Step 6: Final answer
    x = 300,528.18

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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.