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Finding the Fourth Proportional to 308,894.09, 426,324.85 and 212,018.36

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Solution

The fourth proportional to 308,894.09, 426,324.85 and 212,018.36 is: 292,620.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,894.09 : 426,324.85 = 212,018.36 : x
  2. Step 2: Convert to fraction form
    308,894.09/426,324.85 = 212,018.36/x
  3. Step 3: Cross multiply
    308,894.09x = 426,324.85 × 212,018.36
  4. Step 4: Simplify right side
    308,894.09x = 90,388,698,051.97
  5. Step 5: Solve for x
    x = 90,388,698,051.97/308,894.09
  6. Step 6: Final answer
    x = 292,620.35

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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.