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Finding the Fourth Proportional to 281,991.80, 389,162.94 and 154,679.24

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Solution

The fourth proportional to 281,991.80, 389,162.94 and 154,679.24 is: 213,465.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,991.80 : 389,162.94 = 154,679.24 : x
  2. Step 2: Convert to fraction form
    281,991.80/389,162.94 = 154,679.24/x
  3. Step 3: Cross multiply
    281,991.80x = 389,162.94 × 154,679.24
  4. Step 4: Simplify right side
    281,991.80x = 60,195,427,795.37
  5. Step 5: Solve for x
    x = 60,195,427,795.37/281,991.80
  6. Step 6: Final answer
    x = 213,465.17

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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.