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Finding the Fourth Proportional to 309,410.20, 426,978.38 and 171,588.32

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Solution

The fourth proportional to 309,410.20, 426,978.38 and 171,588.32 is: 236,787.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,410.20 : 426,978.38 = 171,588.32 : x
  2. Step 2: Convert to fraction form
    309,410.20/426,978.38 = 171,588.32/x
  3. Step 3: Cross multiply
    309,410.20x = 426,978.38 × 171,588.32
  4. Step 4: Simplify right side
    309,410.20x = 73,264,504,396.94
  5. Step 5: Solve for x
    x = 73,264,504,396.94/309,410.20
  6. Step 6: Final answer
    x = 236,787.62

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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.