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Finding the Fourth Proportional to 315,940.91, 436,028.94 and 186,920.87

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Solution

The fourth proportional to 315,940.91, 436,028.94 and 186,920.87 is: 257,968.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,940.91 : 436,028.94 = 186,920.87 : x
  2. Step 2: Convert to fraction form
    315,940.91/436,028.94 = 186,920.87/x
  3. Step 3: Cross multiply
    315,940.91x = 436,028.94 × 186,920.87
  4. Step 4: Simplify right side
    315,940.91x = 81,502,906,629.83
  5. Step 5: Solve for x
    x = 81,502,906,629.83/315,940.91
  6. Step 6: Final answer
    x = 257,968.83

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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.