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Finding the Fourth Proportional to 394,907.64, 544,970.96 and 213,619.36

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Solution

The fourth proportional to 394,907.64, 544,970.96 and 213,619.36 is: 294,793.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,907.64 : 544,970.96 = 213,619.36 : x
  2. Step 2: Convert to fraction form
    394,907.64/544,970.96 = 213,619.36/x
  3. Step 3: Cross multiply
    394,907.64x = 544,970.96 × 213,619.36
  4. Step 4: Simplify right side
    394,907.64x = 116,416,347,693.79
  5. Step 5: Solve for x
    x = 116,416,347,693.79/394,907.64
  6. Step 6: Final answer
    x = 294,793.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.