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Finding the Fourth Proportional to 399,528.66, 551,351.44 and 218,243.10

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Solution

The fourth proportional to 399,528.66, 551,351.44 and 218,243.10 is: 301,176.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,528.66 : 551,351.44 = 218,243.10 : x
  2. Step 2: Convert to fraction form
    399,528.66/551,351.44 = 218,243.10/x
  3. Step 3: Cross multiply
    399,528.66x = 551,351.44 × 218,243.10
  4. Step 4: Simplify right side
    399,528.66x = 120,328,647,455.06
  5. Step 5: Solve for x
    x = 120,328,647,455.06/399,528.66
  6. Step 6: Final answer
    x = 301,176.51

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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.