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Finding the Fourth Proportional to 288,991.20, 398,820.06 and 178,634.37

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Solution

The fourth proportional to 288,991.20, 398,820.06 and 178,634.37 is: 246,522.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,991.20 : 398,820.06 = 178,634.37 : x
  2. Step 2: Convert to fraction form
    288,991.20/398,820.06 = 178,634.37/x
  3. Step 3: Cross multiply
    288,991.20x = 398,820.06 × 178,634.37
  4. Step 4: Simplify right side
    288,991.20x = 71,242,970,161.46
  5. Step 5: Solve for x
    x = 71,242,970,161.46/288,991.20
  6. Step 6: Final answer
    x = 246,522.97

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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.