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Finding the Fourth Proportional to 399,997.90, 551,986.50 and 236,662.83

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Solution

The fourth proportional to 399,997.90, 551,986.50 and 236,662.83 is: 326,588.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,997.90 : 551,986.50 = 236,662.83 : x
  2. Step 2: Convert to fraction form
    399,997.90/551,986.50 = 236,662.83/x
  3. Step 3: Cross multiply
    399,997.90x = 551,986.50 × 236,662.83
  4. Step 4: Simplify right side
    399,997.90x = 130,634,684,439.36
  5. Step 5: Solve for x
    x = 130,634,684,439.36/399,997.90
  6. Step 6: Final answer
    x = 326,588.43

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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.