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Finding the Fourth Proportional to 219,212.20, 328,818.30 and 194,717.80

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Solution

The fourth proportional to 219,212.20, 328,818.30 and 194,717.80 is: 292,076.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,212.20 : 328,818.30 = 194,717.80 : x
  2. Step 2: Convert to fraction form
    219,212.20/328,818.30 = 194,717.80/x
  3. Step 3: Cross multiply
    219,212.20x = 328,818.30 × 194,717.80
  4. Step 4: Simplify right side
    219,212.20x = 64,026,775,975.74
  5. Step 5: Solve for x
    x = 64,026,775,975.74/219,212.20
  6. Step 6: Final answer
    x = 292,076.70

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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.