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Finding the Fourth Proportional to 315,028.32, 434,729.52 and 171,791.28

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Solution

The fourth proportional to 315,028.32, 434,729.52 and 171,791.28 is: 237,066.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,028.32 : 434,729.52 = 171,791.28 : x
  2. Step 2: Convert to fraction form
    315,028.32/434,729.52 = 171,791.28/x
  3. Step 3: Cross multiply
    315,028.32x = 434,729.52 × 171,791.28
  4. Step 4: Simplify right side
    315,028.32x = 74,682,740,694.59
  5. Step 5: Solve for x
    x = 74,682,740,694.59/315,028.32
  6. Step 6: Final answer
    x = 237,066.75

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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.