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Finding the Fourth Proportional to 389,846.76, 538,035.21 and 236,909.94

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Solution

The fourth proportional to 389,846.76, 538,035.21 and 236,909.94 is: 326,964.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,846.76 : 538,035.21 = 236,909.94 : x
  2. Step 2: Convert to fraction form
    389,846.76/538,035.21 = 236,909.94/x
  3. Step 3: Cross multiply
    389,846.76x = 538,035.21 × 236,909.94
  4. Step 4: Simplify right side
    389,846.76x = 127,465,889,318.99
  5. Step 5: Solve for x
    x = 127,465,889,318.99/389,846.76
  6. Step 6: Final answer
    x = 326,964.09

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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.