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Finding the Fourth Proportional to 399,709.55, 551,217.96 and 261,682.52

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Solution

The fourth proportional to 399,709.55, 551,217.96 and 261,682.52 is: 360,872.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,709.55 : 551,217.96 = 261,682.52 : x
  2. Step 2: Convert to fraction form
    399,709.55/551,217.96 = 261,682.52/x
  3. Step 3: Cross multiply
    399,709.55x = 551,217.96 × 261,682.52
  4. Step 4: Simplify right side
    399,709.55x = 144,244,102,085.97
  5. Step 5: Solve for x
    x = 144,244,102,085.97/399,709.55
  6. Step 6: Final answer
    x = 360,872.29

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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.