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Finding the Fourth Proportional to 402,305.94, 555,179.90 and 221,013.97

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Solution

The fourth proportional to 402,305.94, 555,179.90 and 221,013.97 is: 304,998.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,305.94 : 555,179.90 = 221,013.97 : x
  2. Step 2: Convert to fraction form
    402,305.94/555,179.90 = 221,013.97/x
  3. Step 3: Cross multiply
    402,305.94x = 555,179.90 × 221,013.97
  4. Step 4: Simplify right side
    402,305.94x = 122,702,511,891.79
  5. Step 5: Solve for x
    x = 122,702,511,891.79/402,305.94
  6. Step 6: Final answer
    x = 304,998.01

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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.