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Finding the Fourth Proportional to 389,894.40, 538,100.89 and 236,957.49

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Solution

The fourth proportional to 389,894.40, 538,100.89 and 236,957.49 is: 327,029.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,894.40 : 538,100.89 = 236,957.49 : x
  2. Step 2: Convert to fraction form
    389,894.40/538,100.89 = 236,957.49/x
  3. Step 3: Cross multiply
    389,894.40x = 538,100.89 × 236,957.49
  4. Step 4: Simplify right side
    389,894.40x = 127,507,035,668.77
  5. Step 5: Solve for x
    x = 127,507,035,668.77/389,894.40
  6. Step 6: Final answer
    x = 327,029.67

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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.