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Finding the Fourth Proportional to 304,959.15, 420,857.01 and 168,992.78

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Solution

The fourth proportional to 304,959.15, 420,857.01 and 168,992.78 is: 233,217.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    304,959.15 : 420,857.01 = 168,992.78 : x
  2. Step 2: Convert to fraction form
    304,959.15/420,857.01 = 168,992.78/x
  3. Step 3: Cross multiply
    304,959.15x = 420,857.01 × 168,992.78
  4. Step 4: Simplify right side
    304,959.15x = 71,121,793,998.10
  5. Step 5: Solve for x
    x = 71,121,793,998.10/304,959.15
  6. Step 6: Final answer
    x = 233,217.45

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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.