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Finding the Fourth Proportional to 308,954.28, 426,137.04 and 283,542.72

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Solution

The fourth proportional to 308,954.28, 426,137.04 and 283,542.72 is: 391,087.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,954.28 : 426,137.04 = 283,542.72 : x
  2. Step 2: Convert to fraction form
    308,954.28/426,137.04 = 283,542.72/x
  3. Step 3: Cross multiply
    308,954.28x = 426,137.04 × 283,542.72
  4. Step 4: Simplify right side
    308,954.28x = 120,828,055,414.35
  5. Step 5: Solve for x
    x = 120,828,055,414.35/308,954.28
  6. Step 6: Final answer
    x = 391,087.17

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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.