Home / 389,930.55-538,084.89-217,814.37

Finding the Fourth Proportional to 389,930.55, 538,084.89 and 217,814.37

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Solution

The fourth proportional to 389,930.55, 538,084.89 and 217,814.37 is: 300,573.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,930.55 : 538,084.89 = 217,814.37 : x
  2. Step 2: Convert to fraction form
    389,930.55/538,084.89 = 217,814.37/x
  3. Step 3: Cross multiply
    389,930.55x = 538,084.89 × 217,814.37
  4. Step 4: Simplify right side
    389,930.55x = 117,202,621,321.87
  5. Step 5: Solve for x
    x = 117,202,621,321.87/389,930.55
  6. Step 6: Final answer
    x = 300,573.07

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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.