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Finding the Fourth Proportional to 281,488.87, 388,440.21 and 154,161.73

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Solution

The fourth proportional to 281,488.87, 388,440.21 and 154,161.73 is: 212,735.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,488.87 : 388,440.21 = 154,161.73 : x
  2. Step 2: Convert to fraction form
    281,488.87/388,440.21 = 154,161.73/x
  3. Step 3: Cross multiply
    281,488.87x = 388,440.21 × 154,161.73
  4. Step 4: Simplify right side
    281,488.87x = 59,882,614,971.66
  5. Step 5: Solve for x
    x = 59,882,614,971.66/281,488.87
  6. Step 6: Final answer
    x = 212,735.28

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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.