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Finding the Fourth Proportional to 221,609.79, 307,886.12 and 218,952.59

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Solution

The fourth proportional to 221,609.79, 307,886.12 and 218,952.59 is: 304,194.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,609.79 : 307,886.12 = 218,952.59 : x
  2. Step 2: Convert to fraction form
    221,609.79/307,886.12 = 218,952.59/x
  3. Step 3: Cross multiply
    221,609.79x = 307,886.12 × 218,952.59
  4. Step 4: Simplify right side
    221,609.79x = 67,412,462,407.00
  5. Step 5: Solve for x
    x = 67,412,462,407.00/221,609.79
  6. Step 6: Final answer
    x = 304,194.42

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.