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Finding the Fourth Proportional to 281,512.45, 388,469.68 and 154,180.45

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Solution

The fourth proportional to 281,512.45, 388,469.68 and 154,180.45 is: 212,759.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,512.45 : 388,469.68 = 154,180.45 : x
  2. Step 2: Convert to fraction form
    281,512.45/388,469.68 = 154,180.45/x
  3. Step 3: Cross multiply
    281,512.45x = 388,469.68 × 154,180.45
  4. Step 4: Simplify right side
    281,512.45x = 59,894,430,073.76
  5. Step 5: Solve for x
    x = 59,894,430,073.76/281,512.45
  6. Step 6: Final answer
    x = 212,759.44

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1.5x scale

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.