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Finding the Fourth Proportional to 389,940.51, 538,119.27 and 211,092.51

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Solution

The fourth proportional to 389,940.51, 538,119.27 and 211,092.51 is: 291,308.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,940.51 : 538,119.27 = 211,092.51 : x
  2. Step 2: Convert to fraction form
    389,940.51/538,119.27 = 211,092.51/x
  3. Step 3: Cross multiply
    389,940.51x = 538,119.27 × 211,092.51
  4. Step 4: Simplify right side
    389,940.51x = 113,592,947,383.67
  5. Step 5: Solve for x
    x = 113,592,947,383.67/389,940.51
  6. Step 6: Final answer
    x = 291,308.40

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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.