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Finding the Fourth Proportional to 389,103.70, 536,871.75 and 236,138.32

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Solution

The fourth proportional to 389,103.70, 536,871.75 and 236,138.32 is: 325,815.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,103.70 : 536,871.75 = 236,138.32 : x
  2. Step 2: Convert to fraction form
    389,103.70/536,871.75 = 236,138.32/x
  3. Step 3: Cross multiply
    389,103.70x = 536,871.75 × 236,138.32
  4. Step 4: Simplify right side
    389,103.70x = 126,775,993,100.46
  5. Step 5: Solve for x
    x = 126,775,993,100.46/389,103.70
  6. Step 6: Final answer
    x = 325,815.44

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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.