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Finding the Fourth Proportional to 442,912.90, 664,261.35 and 127,336.90

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Solution

The fourth proportional to 442,912.90, 664,261.35 and 127,336.90 is: 190,974.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,912.90 : 664,261.35 = 127,336.90 : x
  2. Step 2: Convert to fraction form
    442,912.90/664,261.35 = 127,336.90/x
  3. Step 3: Cross multiply
    442,912.90x = 664,261.35 × 127,336.90
  4. Step 4: Simplify right side
    442,912.90x = 84,584,981,098.82
  5. Step 5: Solve for x
    x = 84,584,981,098.82/442,912.90
  6. Step 6: Final answer
    x = 190,974.30

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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.