Home / 389,845.91-538,005.26-215,440.64

Finding the Fourth Proportional to 389,845.91, 538,005.26 and 215,440.64

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Solution

The fourth proportional to 389,845.91, 538,005.26 and 215,440.64 is: 297,317.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,845.91 : 538,005.26 = 215,440.64 : x
  2. Step 2: Convert to fraction form
    389,845.91/538,005.26 = 215,440.64/x
  3. Step 3: Cross multiply
    389,845.91x = 538,005.26 × 215,440.64
  4. Step 4: Simplify right side
    389,845.91x = 115,908,193,770.54
  5. Step 5: Solve for x
    x = 115,908,193,770.54/389,845.91
  6. Step 6: Final answer
    x = 297,317.97

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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.