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Finding the Fourth Proportional to 281,921.48, 389,056.98 and 154,589.48

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Solution

The fourth proportional to 281,921.48, 389,056.98 and 154,589.48 is: 213,336.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,921.48 : 389,056.98 = 154,589.48 : x
  2. Step 2: Convert to fraction form
    281,921.48/389,056.98 = 154,589.48/x
  3. Step 3: Cross multiply
    281,921.48x = 389,056.98 × 154,589.48
  4. Step 4: Simplify right side
    281,921.48x = 60,144,116,228.57
  5. Step 5: Solve for x
    x = 60,144,116,228.57/281,921.48
  6. Step 6: Final answer
    x = 213,336.41

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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.