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Finding the Fourth Proportional to 386,556.68, 533,447.70 and 216,789.32

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Solution

The fourth proportional to 386,556.68, 533,447.70 and 216,789.32 is: 299,168.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,556.68 : 533,447.70 = 216,789.32 : x
  2. Step 2: Convert to fraction form
    386,556.68/533,447.70 = 216,789.32/x
  3. Step 3: Cross multiply
    386,556.68x = 533,447.70 × 216,789.32
  4. Step 4: Simplify right side
    386,556.68x = 115,645,764,138.56
  5. Step 5: Solve for x
    x = 115,645,764,138.56/386,556.68
  6. Step 6: Final answer
    x = 299,168.97

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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.