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Finding the Fourth Proportional to 256,844.70, 385,704.45 and 168,489.90

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Solution

The fourth proportional to 256,844.70, 385,704.45 and 168,489.90 is: 253,021.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,844.70 : 385,704.45 = 168,489.90 : x
  2. Step 2: Convert to fraction form
    256,844.70/385,704.45 = 168,489.90/x
  3. Step 3: Cross multiply
    256,844.70x = 385,704.45 × 168,489.90
  4. Step 4: Simplify right side
    256,844.70x = 64,987,304,210.06
  5. Step 5: Solve for x
    x = 64,987,304,210.06/256,844.70
  6. Step 6: Final answer
    x = 253,021.78

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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.