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Finding the Fourth Proportional to 272,619.60, 408,054.60 and 213,133.20

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Solution

The fourth proportional to 272,619.60, 408,054.60 and 213,133.20 is: 319,015.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    272,619.60 : 408,054.60 = 213,133.20 : x
  2. Step 2: Convert to fraction form
    272,619.60/408,054.60 = 213,133.20/x
  3. Step 3: Cross multiply
    272,619.60x = 408,054.60 × 213,133.20
  4. Step 4: Simplify right side
    272,619.60x = 86,969,982,672.72
  5. Step 5: Solve for x
    x = 86,969,982,672.72/272,619.60
  6. Step 6: Final answer
    x = 319,015.88

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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.