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Finding the Fourth Proportional to 355,100.68, 532,009.26 and 221,917

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Solution

The fourth proportional to 355,100.68, 532,009.26 and 221,917 is: 332,474.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,100.68 : 532,009.26 = 221,917 : x
  2. Step 2: Convert to fraction form
    355,100.68/532,009.26 = 221,917/x
  3. Step 3: Cross multiply
    355,100.68x = 532,009.26 × 221,917
  4. Step 4: Simplify right side
    355,100.68x = 118,061,898,951.42
  5. Step 5: Solve for x
    x = 118,061,898,951.42/355,100.68
  6. Step 6: Final answer
    x = 332,474.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.