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Finding the Fourth Proportional to 399,325.92, 551,072.44 and 218,039.10

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Solution

The fourth proportional to 399,325.92, 551,072.44 and 218,039.10 is: 300,895.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,325.92 : 551,072.44 = 218,039.10 : x
  2. Step 2: Convert to fraction form
    399,325.92/551,072.44 = 218,039.10/x
  3. Step 3: Cross multiply
    399,325.92x = 551,072.44 × 218,039.10
  4. Step 4: Simplify right side
    399,325.92x = 120,155,338,852.40
  5. Step 5: Solve for x
    x = 120,155,338,852.40/399,325.92
  6. Step 6: Final answer
    x = 300,895.42

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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.