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Finding the Fourth Proportional to 512,369.94, 768,553.28 and 138,392.94

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Solution

The fourth proportional to 512,369.94, 768,553.28 and 138,392.94 is: 207,588.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,369.94 : 768,553.28 = 138,392.94 : x
  2. Step 2: Convert to fraction form
    512,369.94/768,553.28 = 138,392.94/x
  3. Step 3: Cross multiply
    512,369.94x = 768,553.28 × 138,392.94
  4. Step 4: Simplify right side
    512,369.94x = 106,362,347,965.84
  5. Step 5: Solve for x
    x = 106,362,347,965.84/512,369.94
  6. Step 6: Final answer
    x = 207,588.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.