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Finding the Fourth Proportional to 214,927.20, 322,390.80 and 165,103.20

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Solution

The fourth proportional to 214,927.20, 322,390.80 and 165,103.20 is: 247,654.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    214,927.20 : 322,390.80 = 165,103.20 : x
  2. Step 2: Convert to fraction form
    214,927.20/322,390.80 = 165,103.20/x
  3. Step 3: Cross multiply
    214,927.20x = 322,390.80 × 165,103.20
  4. Step 4: Simplify right side
    214,927.20x = 53,227,752,730.56
  5. Step 5: Solve for x
    x = 53,227,752,730.56/214,927.20
  6. Step 6: Final answer
    x = 247,654.80

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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.