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Finding the Fourth Proportional to 259,361.60, 389,042.40 and 165,972.80

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Solution

The fourth proportional to 259,361.60, 389,042.40 and 165,972.80 is: 248,959.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,361.60 : 389,042.40 = 165,972.80 : x
  2. Step 2: Convert to fraction form
    259,361.60/389,042.40 = 165,972.80/x
  3. Step 3: Cross multiply
    259,361.60x = 389,042.40 × 165,972.80
  4. Step 4: Simplify right side
    259,361.60x = 64,570,456,446.72
  5. Step 5: Solve for x
    x = 64,570,456,446.72/259,361.60
  6. Step 6: Final answer
    x = 248,959.20

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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.