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Finding the Fourth Proportional to 315,171.97, 434,936.71 and 171,931.97

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Solution

The fourth proportional to 315,171.97, 434,936.71 and 171,931.97 is: 237,265.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,171.97 : 434,936.71 = 171,931.97 : x
  2. Step 2: Convert to fraction form
    315,171.97/434,936.71 = 171,931.97/x
  3. Step 3: Cross multiply
    315,171.97x = 434,936.71 × 171,931.97
  4. Step 4: Simplify right side
    315,171.97x = 74,779,525,375.62
  5. Step 5: Solve for x
    x = 74,779,525,375.62/315,171.97
  6. Step 6: Final answer
    x = 237,265.79

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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.