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Finding the Fourth Proportional to 281,956.58, 389,100.12 and 154,634.84

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Solution

The fourth proportional to 281,956.58, 389,100.12 and 154,634.84 is: 213,396.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,956.58 : 389,100.12 = 154,634.84 : x
  2. Step 2: Convert to fraction form
    281,956.58/389,100.12 = 154,634.84/x
  3. Step 3: Cross multiply
    281,956.58x = 389,100.12 × 154,634.84
  4. Step 4: Simplify right side
    281,956.58x = 60,168,434,800.18
  5. Step 5: Solve for x
    x = 60,168,434,800.18/281,956.58
  6. Step 6: Final answer
    x = 213,396.10

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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.