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Finding the Fourth Proportional to 308,469.91, 425,670.78 and 170,640.58

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Solution

The fourth proportional to 308,469.91, 425,670.78 and 170,640.58 is: 235,474.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,469.91 : 425,670.78 = 170,640.58 : x
  2. Step 2: Convert to fraction form
    308,469.91/425,670.78 = 170,640.58/x
  3. Step 3: Cross multiply
    308,469.91x = 425,670.78 × 170,640.58
  4. Step 4: Simplify right side
    308,469.91x = 72,636,708,788.25
  5. Step 5: Solve for x
    x = 72,636,708,788.25/308,469.91
  6. Step 6: Final answer
    x = 235,474.21

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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.