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Finding the Fourth Proportional to 399,519, 551,336.22 and 220,682.52

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Solution

The fourth proportional to 399,519, 551,336.22 and 220,682.52 is: 304,541.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,519 : 551,336.22 = 220,682.52 : x
  2. Step 2: Convert to fraction form
    399,519/551,336.22 = 220,682.52/x
  3. Step 3: Cross multiply
    399,519x = 551,336.22 × 220,682.52
  4. Step 4: Simplify right side
    399,519x = 121,670,266,396.87
  5. Step 5: Solve for x
    x = 121,670,266,396.87/399,519
  6. Step 6: Final answer
    x = 304,541.88

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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.