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Finding the Fourth Proportional to 389,124, 536,991.12 and 210,276

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Solution

The fourth proportional to 389,124, 536,991.12 and 210,276 is: 290,180.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,124 : 536,991.12 = 210,276 : x
  2. Step 2: Convert to fraction form
    389,124/536,991.12 = 210,276/x
  3. Step 3: Cross multiply
    389,124x = 536,991.12 × 210,276
  4. Step 4: Simplify right side
    389,124x = 112,916,344,749.12
  5. Step 5: Solve for x
    x = 112,916,344,749.12/389,124
  6. Step 6: Final answer
    x = 290,180.88

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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.