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Finding the Fourth Proportional to 315,961.80, 436,027.32 and 172,722.48

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Solution

The fourth proportional to 315,961.80, 436,027.32 and 172,722.48 is: 238,357.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,961.80 : 436,027.32 = 172,722.48 : x
  2. Step 2: Convert to fraction form
    315,961.80/436,027.32 = 172,722.48/x
  3. Step 3: Cross multiply
    315,961.80x = 436,027.32 × 172,722.48
  4. Step 4: Simplify right side
    315,961.80x = 75,311,720,058.15
  5. Step 5: Solve for x
    x = 75,311,720,058.15/315,961.80
  6. Step 6: Final answer
    x = 238,357.04

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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.