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Finding the Fourth Proportional to 308,802.45, 426,020.49 and 187,923.90

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Solution

The fourth proportional to 308,802.45, 426,020.49 and 187,923.90 is: 259,257.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,802.45 : 426,020.49 = 187,923.90 : x
  2. Step 2: Convert to fraction form
    308,802.45/426,020.49 = 187,923.90/x
  3. Step 3: Cross multiply
    308,802.45x = 426,020.49 × 187,923.90
  4. Step 4: Simplify right side
    308,802.45x = 80,059,431,960.71
  5. Step 5: Solve for x
    x = 80,059,431,960.71/308,802.45
  6. Step 6: Final answer
    x = 259,257.76

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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.