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Finding the Fourth Proportional to 399,126.64, 550,806.73 and 217,850.46

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Solution

The fourth proportional to 399,126.64, 550,806.73 and 217,850.46 is: 300,640.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,126.64 : 550,806.73 = 217,850.46 : x
  2. Step 2: Convert to fraction form
    399,126.64/550,806.73 = 217,850.46/x
  3. Step 3: Cross multiply
    399,126.64x = 550,806.73 × 217,850.46
  4. Step 4: Simplify right side
    399,126.64x = 119,993,498,956.97
  5. Step 5: Solve for x
    x = 119,993,498,956.97/399,126.64
  6. Step 6: Final answer
    x = 300,640.17

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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.