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Finding the Fourth Proportional to 279,816.44, 386,135.42 and 152,489.30

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Solution

The fourth proportional to 279,816.44, 386,135.42 and 152,489.30 is: 210,429.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,816.44 : 386,135.42 = 152,489.30 : x
  2. Step 2: Convert to fraction form
    279,816.44/386,135.42 = 152,489.30/x
  3. Step 3: Cross multiply
    279,816.44x = 386,135.42 × 152,489.30
  4. Step 4: Simplify right side
    279,816.44x = 58,881,517,207.88
  5. Step 5: Solve for x
    x = 58,881,517,207.88/279,816.44
  6. Step 6: Final answer
    x = 210,429.09

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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.